0001262039-12-000021 | 10-K/A | XBRL Viewer

Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2011

Finite-Lived Intangible Assets [Abstract]

Schedule of Finite-Lived Intangible Assets by Major Class [Table Text Block]

The following table presents the detail of our existing intangible assets with definite lives included in other assets as of December 31, 2011 ($ amounts in 000's):



	Gross	Accumulated Amortization	Net
Existing intangibles	1,772	394	1,378

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

The following table summarizes estimated future amortization expense of purchased intangible assets with definite lives for the future fiscal year ($ amounts in 000's):



	Amount
Fiscal Years:
2012	563
2013	611
2014	204
Total	1,378

Acquisitions	12 Months Ended
Acquisitions	Dec. 31, 2011
Business Combinations [Abstract]
ACQUISITIONS	ACQUISITIONS On April 6, 2011, we completed the acquisition of TalkSwitch Corp. (TalkSwitch), a privately held company that provides voice over IP phone system technology, for a cash payment of $2.6 million. We accounted for this acquisition as a purchase of a business and, accordingly, the total purchase price has been allocated to TalkSwitch tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair market values as of the acquisition date. The purchase price allocation resulted in purchased tangible assets of approximately $0.9 million and liabilities of $0.1 million and purchased identifiable intangible assets of approximately $1.8 million. Identifiable intangible assets consist of purchased technology. The fair value assigned to identifiable intangible assets acquired is determined using the income approach, which discounts expected future cash flows to present value using estimates and assumptions determined by us. Purchased identifiable intangible assets are being amortized on a straight-line basis over three years. The financial results of this acquisition are considered immaterial for purposes of pro forma financial disclosures.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 88-16
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 51, 52
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Appendix F
-Paragraph F4
-Subparagraph e

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-Paragraph 67-73
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Employee Benefit Plan (Details)	12 Months Ended
Employee Benefit Plan (Details)	Dec. 31, 2011 USD ($)
Employee Benefit Plan [Abstract]
IRS annual contribution limit	$ 16,500
Matching contribution on employee contributions, Percent	50.00%
Maximum contibution percentage of each employee's eligible earnings, Percent	4.00%
Matching contributions to the RRSP and 401(k) Plans	$ 1,500,000

Document and Entity Information - USD ($)	12 Months Ended
Document and Entity Information - USD ($)	Dec. 31, 2011	Feb. 17, 2012	Jun. 30, 2011
Document Information [Line Items]
Entity Registrant Name	FORTINET INC
Entity Central Index Key	0001262039
Document Type	10-K
Document Period End Date	Dec. 31, 2011
Amendment Flag	false
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Well Known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Common Stock, Shares Outstanding		156,363,007
Entity Public Float			$ 2,977,981,761

Financial Instruments and Fair Value , Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 468,270	$ 320,472
Unrealized Gains	273	175
Unrealized Losses	(1,846)	(46)
Total Fair Value	466,697	320,601
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	294,000
Less Than 12 Months, Unrealized Losses	(1,846)
12 Months or Greater, Fair Value	0
12 Months or Greater, Unrealized Losses	0
Total, Fair Value	294,000
Total, Unrealized Losses	(1,846)
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]
Due within one year	318,283	246,651
Due after one year	148,414	73,950
Total Fair Value	466,697	320,601
U.S. government and agency securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	38,900	51,989
Unrealized Gains	10	0
Unrealized Losses	(2)	(46)
Total Fair Value	38,908	51,943
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	10,996
Less Than 12 Months, Unrealized Losses	(2)
12 Months or Greater, Fair Value	0
12 Months or Greater, Unrealized Losses	0
Total, Fair Value	10,996
Total, Unrealized Losses	(2)
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]
Total Fair Value	38,908	51,943
Corporate debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	339,110	213,237
Unrealized Gains	219	159
Unrealized Losses	(1,832)	0
Total Fair Value	337,497	213,396
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	258,159
Less Than 12 Months, Unrealized Losses	(1,832)
12 Months or Greater, Fair Value	0
12 Months or Greater, Unrealized Losses	0
Total, Fair Value	258,159
Total, Unrealized Losses	(1,832)
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]
Total Fair Value	337,497	213,396
Commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	51,025	38,914
Unrealized Gains	7	5
Unrealized Losses	(5)	0
Total Fair Value	51,027	38,919
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	9,279
Less Than 12 Months, Unrealized Losses	(5)
12 Months or Greater, Fair Value	0
12 Months or Greater, Unrealized Losses	0
Total, Fair Value	9,279
Total, Unrealized Losses	(5)
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]
Total Fair Value	51,027	38,919
Municipal bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	20,473	11,069
Unrealized Gains	36	11
Unrealized Losses	(5)	0
Total Fair Value	20,504	11,080
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	8,067
Less Than 12 Months, Unrealized Losses	(5)
12 Months or Greater, Fair Value	0
12 Months or Greater, Unrealized Losses	0
Total, Fair Value	8,067
Total, Unrealized Losses	(5)
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]
Total Fair Value	20,504	11,080
Certificates of deposit and term deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	18,762	5,263
Unrealized Gains	1	0
Unrealized Losses	(2)	0
Total Fair Value	18,761	5,263
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	7,499
Less Than 12 Months, Unrealized Losses	(2)
12 Months or Greater, Fair Value	0
12 Months or Greater, Unrealized Losses	0
Total, Fair Value	7,499
Total, Unrealized Losses	(2)
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]
Total Fair Value	$ 18,761	$ 5,263

Income Taxes , Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 18,500
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	600	$ 200
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance, beginning of year	12,083	3,387	$ 1,952
Increases for tax positions related to the current year	9,049	8,696	440
Increases (decreases) for tax positions related to the prior year	(1,863)	0	995
Balance, end of year	19,269	12,083	$ 3,387
Liability for Uncertain Tax Positions, Noncurrent	$ 19,100	$ 11,200

Summary of Significant Accounting Policies , Derivatives (Details) - Dec. 31, 2011 € in Thousands, £ in Thousands, $ in Thousands	CAD ($)	EUR (€)	GBP (£)
EUR
Derivative [Line Items]
Notional Amount of Foreign Currency Derivative Purchase Contracts \| €		€ 5,526
GBP
Derivative [Line Items]
Notional Amount of Foreign Currency Derivative Purchase Contracts \| £			£ 1,545
CAD
Derivative [Line Items]
Notional Amount of Foreign Currency Derivative Purchase Contracts \| $	$ 12,000

Income Per Share

12 Months Ended

Dec. 31, 2011

Earnings Per Share [Abstract]

INCOME PER SHARE

Basic net income per share is computed by dividing net income attributable to common stockholders by the weighted-average number of common shares outstanding during the period. Diluted net income per share is computed by dividing net income attributable to common stockholders by the weighted-average number of common shares outstanding, plus the dilutive effects of stock options and warrants. Potentially dilutive common shares are determined by applying the treasury stock method to the assumed exercise of outstanding stock options.

Net income per share information for fiscal 2009 gives effect to the repurchase of convertible preferred shares (Note 10). The excess of the fair value of the consideration paid for such preferred stock over the carrying value of the preferred stock represents a return to the preferred stockholders and is treated in a manner similar to the treatment of dividends paid to the holders of preferred stock in the computation of income per share. As a result, the premium paid is subtracted from net income attributable to common stockholders in determining income per share.

In November 2009, all of our outstanding convertible preferred stock converted into common stock in connection with our initial public offering. For periods that ended prior to such conversion, net income per share information is computed using the two-class method. The convertible preferred shares were entitled to receive annual non-cumulative dividends of $0.02, $0.05, $0.12, $0.12 and $0.30 per share for Series A, B, C, D, and E, respectively, payable prior and in preference to holders of common stock. After the payment of such dividends, convertible preferred shares were further entitled to receive a proportionate amount of any dividends paid on common stock on an if-converted basis. As a result of such dividend rights, the convertible preferred shares are considered to be participating securities. Under the two-class method of computing income per share, net income attributable to common stockholders is computed by an adjustment to subtract from net income the portion of current year earnings that the preferred stockholders would have been entitled to receive pursuant to their dividend rights had all of the year’s earnings been distributed. No such adjustment to earnings is made during periods with a net loss, as the holders of the convertible preferred shares had no obligation to fund losses.

A reconciliation of the numerator and denominator used in the calculation of basic and diluted net income per share follows ($ and share amounts in 000's, except per share amounts):



	Fiscal Year
	2011	2010	2009
Numerator:
Net income	62,492	41,245	60,179
Premium paid on repurchase of convertible preferred shares	—	—	(9,266	)
Net income attributable to common stockholders-basic and diluted	62,492	41,245	50,913

Denominator:
Basic shares:
Weighted-average common shares outstanding-basic	152,581	140,726	52,668
Diluted shares:
Weighted-average common shares outstanding-basic	152,581	140,726	52,668
Effect of potentially dilutive securities:
Employee stock options	11,200	15,524	11,742
Employee stock purchase rights	—	—	—
Warrants to purchase common stock	—	156	38
Convertible preferred stock	—	—	65,990
Weighted-average shares used to compute diluted net income per share	163,781	156,406	130,438
Net income per share attributable to common stockholders:
Basic	0.41	0.29	0.97
Diluted	0.38	0.26	0.39

The following weighted-average outstanding shares of options and employee stock purchase rights were excluded from the computation of diluted net income per common share applicable to common stockholders for the periods presented, as their effect would have been antidilutive (in 000's):



	Fiscal Year
	2011	2010	2009
Options to purchase common stock	3,893	3,006	9,168
Employee stock purchase rights	122	—	—

Stockholder's Equity	12 Months Ended
Stockholder's Equity	Dec. 31, 2011
Equity [Abstract]
STOCKHOLDER'S EQUITY	STOCKHOLDERS’ EQUITY Common Shares Reserved for Issuance—At December 31, 2011, we had reserved 46,789,659 common shares for issuance. Stock Repurchase—While we were a privately-held company, during the first six months of fiscal 2009, our Board of Directors approved a stock repurchase authorization. This repurchase authorization allowed us to repurchase up to $20.0 million of our convertible preferred and common stock at $4.25 per share through June 17, 2009. This repurchase authorization expressly excluded our board members and senior management. We repurchased 1,409,264 shares of common stock and 6,008,330 shares of convertible preferred stock for a total consideration of $15.7 million in fiscal 2009.

- Definition

The entire disclosure for shareholders' equity, comprised of portions attributable to the parent entity and noncontrolling interest, if any, including other comprehensive income (as applicable). Including, but not limited to: (1) balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings; (2) accumulated balance for each classification of other comprehensive income and total amount of comprehensive income; (3) amount and nature of changes in separate accounts, including the number of shares authorized and outstanding, number of shares issued upon exercise and conversion, and for other comprehensive income, the adjustments for reclassifications to net income; (4) rights and privileges of each class of stock authorized; (5) basis of treasury stock, if other than cost, and amounts paid and accounting treatment for treasury stock purchased significantly in excess of market; (6) dividends paid or payable per share and in the aggregate for each class of stock for each period presented; (7) dividend restrictions and accumulated preferred dividends in arrears (in aggregate and per share amount); (8) retained earnings appropriations or restrictions, such as dividend restrictions; (9) impact of change in accounting principle, initial adoption of new accounting principle and correction of an error in previously issued financial statements; (10) shares held in trust for Employee Stock Ownership Plan (ESOP); (11) deferred compensation related to issuance of capital stock; (12) note received for issuance of stock; (13) unamortized discount on shares; (14) description, terms, and number of warrants or rights outstanding; (15) shares under subscription and subscription receivables, effective date of new retained earnings after quasi-reorganization and deficit eliminated by quasi-reorganization and, for a period of at least ten years after the effective date, the point in time from which the new retained dates; and (16) retroactive effective of subsequent change in capital structure.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 12
-Paragraph 10
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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-Number 210
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+ Details

Property and Equipment - Net

12 Months Ended

Dec. 31, 2011

Property, Plant and Equipment [Abstract]

PROPERTY AND EQUIPMENT - Net

PROPERTY AND EQUIPMENT—Net

Property and equipment consisted of the following ($ amounts in 000's):



	December 31, 2011		December 31, 2010
Evaluation units	13,912		10,607
Computer equipment and software	12,219		9,561
Furniture and fixtures	1,307		1,087
Leasehold improvements and tooling	4,381		4,548
Total property and equipment	31,819		25,803
Less: accumulated depreciation	(23,853	)	(18,747	)
Property and equipment—net	7,966		7,056

Depreciation expense was $7.0 million, $5.7 million and $5.0 million in 2011, 2010 and 2009, respectively.

- Definition

The entire disclosure for long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. This disclosure may include property plant and equipment accounting policies and methodology, a schedule of property, plant and equipment gross, additions, deletions, transfers and other changes, depreciation, depletion and amortization expense, net, accumulated depreciation, depletion and amortization expense and useful lives, income statement disclosures, assets held for sale and public utility disclosures.

+ References + Details

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2011

Accounting Policies [Abstract]

Basis of Presentation and Preparation

Basis of Presentation and Preparation—The consolidated financial statements include the accounts of Fortinet and its wholly owned subsidiaries (collectively, the “Company,” “we,” “us” or “our”). All intercompany transactions and balances have been eliminated in consolidation. Beginning 2005 fiscal year, we adopted a 52- to 53-week year ending on the Sunday closest to December 31 of each year. Commencing in the third quarter of fiscal 2009, we began operating and reporting financial results on a calendar quarter and year basis. Our 2009 fiscal year ended on December 31, 2009. Fiscal 2011, 2010 and 2009 were comprised of 365 days, 365 days and 368 days, respectively.

Effective June 1, 2011, we completed a two-for-one stock split of our outstanding common shares in the form of a stock dividend. All shares and per share information referenced throughout the consolidated financial statements have been retroactively adjusted to reflect this stock split.

Use of Estimates

Use of Estimates—The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Such management estimates include implicit service periods for revenue recognition, litigation and settlement costs and other loss contingencies, sales returns and allowances, reserve for bad debt, inventory write-offs, reserve for warranty costs, valuation of deferred tax assets, and tangible and intangible assets. We base our estimates on historical experience and also on assumptions that we believe are reasonable. Actual results could differ from those estimates.

Certain Significant Risks and Uncertainties

Certain Significant Risks and Uncertainties—We are subject to certain risks and uncertainties that could have a material adverse effect on our future financial position or results of operations, such as the following: changes in level of demand for our products and services, the timing and success of new product and service introductions by us or our competitors, price and sales competition and our ability to adapt to changing market conditions and dynamics such as changes in end-customer, distributor or reseller requirements or market needs, changes in expenses caused, for example, by fluctuations in foreign currency exchange rates, management of inventory, internal control over financial reporting, market acceptance of our new products and services, demand for UTM products and services in general, seasonality, failure of our channel partners to perform or other disruption in our channel, the quality of our products and services and the market perception of our response to new viruses or security breaches, general economic conditions, challenges in doing business outside of the United States of America, changes in customer relationships, litigation, or claims against us based on intellectual property, patent, product regulatory or other factors (Note 9), product obsolescence, and our ability to attract and retain qualified employees.

We rely on sole suppliers and independent contract manufacturers for certain of our components and one third-party logistics company for certain distribution of our products. The inability of any of these parties to fulfill our supply and logistics requirements could negatively impact our future operating results.

Concentration of Credit Risk

Concentration of Credit Risk—Financial instruments that subject us to concentrations of credit risk consist primarily of cash, cash equivalents, short-term investments, and accounts receivable. We maintain our cash and cash equivalents in fixed income securities with major financial institutions, which our management assesses to be of high credit quality, in order to limit the exposure of each investment. Deposits held with banks may exceed the amount of insurance provided on such deposits.

Credit risk with respect to accounts receivable in general is diversified due to the number of different entities comprising our customer base and their location throughout the world. We perform ongoing credit evaluations of our customers and generally do not require collateral on accounts receivable. We maintain reserves for estimated potential credit losses.

At December 31, 2011 and December 31, 2010, no single customer accounted for more than 10% of net accounts receivable.

During fiscal 2011 and 2010, no single customer accounted for more than 10% of total net revenues. During fiscal 2009, one customer accounted for 12% of total net revenues.

Financial Instruments and Fair Value

Financial Instruments and Fair Value—We apply fair value accounting for all financial assets and liabilities and non-financial assets and liabilities that are recognized or disclosed at fair value in the financial statements on a recurring basis. Due to their short-term nature, the carrying amounts reported in the consolidated financial statements approximate the fair value for accounts receivable, accounts payable, accrued compensation, and other current liabilities.

Comprehensive Income (Loss)

Comprehensive Income (Loss)—ASC 220 establishes standards for the reporting and displaying of comprehensive income and its components. Comprehensive income includes certain changes in equity from non-owner sources that are excluded from net income. Specifically, cumulative foreign currency translation adjustments, unrealized gains and losses on available-for-sale investments, and unrealized gains and losses on derivatives are included in comprehensive income in stockholders' equity.

Foreign Currency Translation

Foreign Currency Translation—Assets and liabilities of foreign subsidiaries are translated into U.S. dollars using the exchange rates in effect at the balance sheet dates and revenue and expenses are translated using average exchange rates during the period. The resulting foreign translation adjustments are recorded in accumulated other comprehensive income (loss). Foreign currency transaction gains (losses) of $(0.4) million, $(0.8) million and $0.1 million, are included in other income (expense), net for fiscal 2011, 2010 and 2009, respectively.

Cash, Cash Equivalents and Available-for-sale Investments

Cash, Cash Equivalents and Available-for-sale Investments—We consider all highly liquid investments, purchased with original maturities of three months or less, to be cash equivalents. Cash and cash equivalents consist of cash on-hand, balances with banks, and highly liquid investments in money market funds, commercial paper, and certificates of deposit.

We classify our investments as available-for-sale at the time of purchase since it is our intent that these investments are available for current operations, and include these investments on our balance sheet as either short-term or long-term investments depending on their maturity at the time of purchase. Investments with original maturities greater than three months that mature less than one year from the consolidated balance sheet date are classified as short-term investments. Investments with maturities greater than one year from the consolidated balance sheet date are classified as long-term investments.

Investments are considered to be impaired when a decline in fair value is judged to be other-than-temporary. We consult with our investment managers and consider available quantitative and qualitative evidence in evaluating potential impairment of our investments on a quarterly basis. If the cost of an individual investment exceeds its fair value, we evaluate, among other factors, general market conditions, the duration and extent to which the fair value is less than cost, and our intent and ability to hold the investment. Once a decline in fair value is determined to be other-than-temporary, an impairment charge is recorded and a new cost basis in the investment is established.

For debt securities in an unrealized loss position which are deemed to be other-than-temporary, the difference between the security's then-current amortized cost basis and fair value is separated into (i) the amount of the impairment related to the credit loss (i.e., the credit loss component) and (ii) the amount of the impairment related to all other factors (i.e., the non-credit loss component). The credit loss component is recognized in earnings. The non-credit loss component is recognized in accumulated other comprehensive loss.

Inventory

Inventory—Inventory is recorded at the lower of cost (using the first-in, first-out method) or market, after we give appropriate consideration to obsolescence and inventory in excess of anticipated future demand. In assessing the ultimate recoverability of inventory, we are required to make estimates regarding future customer demand, the timing of new product introductions, economic trends and market conditions. If the actual product demand is significantly lower than forecasted, we could be required to record additional inventory write-downs, which could have an adverse impact on our gross margins and profitability.

Deferred Cost of Revenues

Deferred Cost of Revenues—Deferred cost of revenues represent the unamortized cost of products associated with services and ratable and other revenue, which is based upon the actual cost of the hardware sold and is recognized over the service periods of the arrangements. Deferred cost of revenue associated with short-term deferred revenue is classified as short-term and deferred cost of revenue associated with long-term deferred revenue is classified as long-term.

Property and Equipment

Property and Equipment—Property and equipment are stated at cost. Depreciation is computed using the straight-line method over the estimated useful lives of the assets, generally one to three years. Evaluation units are transferred from inventory at cost and are amortized over one year from the date of transfer. Leasehold improvements are amortized over the shorter of the estimated useful lives of the improvements or the lease term.

Impairment of Long-Lived Assets

Impairment of Long-Lived Assets—We evaluate events and changes in circumstances that could indicate carrying amounts of long-lived assets, including intangible assets, may not be recoverable. When such events or changes in circumstances occur, we assess the recoverability of long-lived assets by determining whether the carrying value of such assets will be recovered through undiscounted expected future cash flows. If the total of the future undiscounted cash flows is less than the carrying amount of those assets, we record an impairment charge in the period in which we make the determination. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets.

Deferred Revenue and Revenue Recognition

Revenue Recognition—In October 2009, the FASB amended the ASC as summarized in ASU No. 2009-13, Revenue Recognition (Topic 605): Multiple-Deliverable Revenue Arrangements, and ASU No. 2009-14, Software (Topic 985): Certain Revenue Arrangements That Include Software Elements. ASU 2009-13 amends the accounting for multiple-element arrangements to provide guidance on how the deliverables in an arrangement should be separated and eliminates the use of the residual method. ASU 2009-13 also requires an entity to allocate revenue using the relative selling price method. The standard establishes a hierarchy of evidence to determine the stand-alone selling price of a deliverable based on VSOE, TPE, and the BESP. If VSOE is available, it would be used to determine the selling price of a deliverable. If VSOE is not available, the entity would determine whether TPE is available. If so, TPE must be used to determine the selling price. If TPE is not available, then the BESP would be used. ASU 2009-14 amends industry specific revenue accounting guidance for software and software related transactions to exclude from its scope tangible products containing software components and non-software components that function together to deliver the product's essential functionality.

Effective January 1, 2011, we adopted the provisions of ASU 2009-13 and ASU 2009-14 for new and materially modified arrangements originating after December 31, 2010. The adoption of ASU 2009-13 and ASU 2009-14, increased revenues $20.0 million for fiscal 2011. The increase was primarily due to certain product revenue, which can now be recognized upon shipment, but would have been deferred under the previous revenue recognition rules. We expect the adoption of ASU 2009-13 and ASU 2009-14 to have an impact on future periods; however, we cannot reasonably estimate the effect of adopting these standards on future financial periods as the impact will vary depending on the nature and volume of new or materially modified arrangements in any given period.

This guidance does not generally change the units of accounting for our revenue transactions. Most non-software products and services qualify as separate units of accounting because they have value to the customer on a standalone basis and our revenue arrangements generally do not include a right of return relative to delivered products.

The majority of our products are hardware appliances containing software components that function together to provide the essential functionality of the product, therefore, our hardware appliances are considered non-software deliverables and are no longer within the scope of ASC 985-605.

Our product revenue also includes software products that may operate on the hardware appliances, but are not considered essential to the functionality of the hardware and continue to be subject to the guidance at ASC 985-605, which remains unchanged. This includes the use of the residual method for multiple element arrangements. Certain of our software, when sold with our appliances, is considered essential to its functionality and as a result is no longer accounted for under ASC 985-605; however, this same software if sold separately is accounted for under the guidance at ASC 985-605.

For all transactions originating or materially modified after December 31, 2010, we recognize revenue in accordance with ASU 2009-13. Certain arrangements with multiple deliverables may continue to have software deliverables that are subject to ASC 985-605 along with non-software deliverables that are subject to the ASU 2009-13. When a sales arrangement contains multiple elements, such as hardware appliances, software, customer support services, and/or professional services, we allocate revenue to each element based on the aforementioned selling price hierarchy. In multiple element arrangements where software is more-than-incidental, revenue is allocated to each separate unit of accounting for each of the non-software deliverables and to the software deliverables as a group using the relative selling prices of each of the deliverables in the arrangement based on the selling price hierarchy in ASU 2009-13.

VSOE of fair value for elements of an arrangement is based upon the normal pricing and discounting practices for those services when sold separately. In determining VSOE, we require that a substantial majority of the selling prices for a service fall within a reasonably narrow pricing range, generally evidenced by a substantial majority of such historical stand-alone transactions falling within a reasonably narrow range of the median rates. In addition, we consider major segments, geographies, customer classifications, and other variables in determining VSOE.

We are typically not able to determine TPE for our products or services. TPE is determined based on competitor prices for similar deliverables when sold separately. Generally, our go-to-market strategy differs from that of our peers and our offerings contain a significant level of differentiation such that the comparable pricing of products with similar functionality cannot be obtained. Furthermore, we are unable to reliably determine what similar competitor products' selling prices are on a stand-alone basis.

For our hardware appliances we use BESP as our selling price. For our support and services, we generally use VSOE as our selling price. When we are unable to establish a selling price using VSOE for our support and services, we use BESP in our allocation of arrangement consideration. The objective of BESP is to determine the price at which we would transact a sale if the product or service were sold on a stand-alone basis. We determine BESP for a product or service by considering multiple factors including, but not limited to, cost of products, gross margin objectives, pricing practices, geographies, customer classes and distribution channels. We review our BESP estimates on a quarterly basis to coincide with our VSOE review process.

We recognize revenue for our software sales based on software revenue recognition guidance pursuant to ASC 985-605. Under ASC 985-605, we use the residual method to recognize revenue when a product agreement includes one or more elements to be delivered and VSOE of fair value for all undelivered elements exists. If evidence of the fair value of one or more undelivered elements does not exist, all revenue is generally deferred and recognized when delivery of those elements occurs or when fair value can be established. When the undelivered element for which we do not have VSOE of fair value is support, revenue for the entire arrangement is recognized ratably over the support period.

We derive revenue from sales of products, including appliances and software, and services, including subscription, support and other services. Our appliances include operating system software that is integrated into the appliance hardware and is deemed essential to its functionality. As a result, we account for revenue in accordance with ASC 985-605 and all related interpretations.

Revenue is recognized when all of the following criteria have been met:


•	Persuasive evidence of an arrangement exists. Binding contracts or purchase orders are generally used to determine the existence of an arrangement.


•	Delivery has occurred. Delivery occurs when we fulfill an order and title and risk of loss has been transferred or upon delivery of the service contract registration code.


•	The fee is fixed or determinable. We assess whether the fee is fixed or determinable based on the payment terms associated with the transaction. In the event payment terms differ from our standard business practices, the fees are deemed to be not fixed or determinable and revenue is recognized when the payments become due, provided the remaining criteria for revenue recognition have been met.


•	Collectability is probable. We assess collectability based primarily on creditworthiness as determined by credit checks and analysis, as well as payment history. Payment terms generally range from 30 to 90 days from invoice date.

For arrangements which include end-customer acceptance criteria, revenue is recognized upon acceptance. We recognize product revenue on sales to distributors that have no general right of return and direct sales to end-customers upon shipment, once all other revenue recognition criteria have been met. We also recognize revenue upon sell-through for distributor agreements that allow for rights of return. Such returns are estimated and recorded as a reduction to revenue. Substantially all of our products have been sold in combination with services, which consist of subscriptions and/or support. Subscription services provide access to our antivirus, intrusion prevention, web filtering, and anti-spam functionality. Support services include rights to unspecified software upgrades, maintenance releases and patches, telephone and Internet access to technical support personnel, and hardware support.

The subscription and support services start on the date the customer registers the appliance. The customer is then entitled to service for the stated contractual period beginning on the registration date.

We offer certain sales incentives to channel partners. We reduce revenue for estimates of sales returns and allowances. Additionally, in limited circumstances we may permit end-customers, distributors and resellers to return our products, subject to varying limitations, for a refund within a reasonably short period from the date of purchase. We estimate and record reserves for sales incentives and sales returns based on historical experience.

Deferred Revenue—Deferred revenue consists of amounts that have been invoiced but that have not yet been recognized as revenue.

Income Taxes

Income Taxes—We record income taxes using the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been recognized in our financial statements or tax returns. In estimating future tax consequences, generally all expected future events other than enactments or changes in the tax law or rates are considered. We assess the likelihood that some portion or all of our deferred tax assets will be recovered from future taxable income within the respective jurisdictions, and to the extent we believe that recovery does not meet the “more-likely-than-not” standard, based solely on its technical merits as of the reporting date, we establish a valuation allowance. We consider many factors when evaluating and estimating our tax positions and tax benefits, which may require periodic adjustments and which may not accurately anticipate actual outcomes.

We operate in various tax jurisdictions and are subject to audit by various tax authorities. We provide for tax contingencies whenever it is deemed more likely than not that a tax asset has been impaired or a tax liability has been incurred for events such as tax claims or changes in tax laws. Tax contingencies are based upon their technical merits, relevant tax law and the specific facts and circumstances as of each reporting period. Changes in facts and circumstances could result in material changes to the amounts recorded for such tax contingencies.

Stock-Based Compensation

Stock-Based Compensation—We apply ASC 718 to our stock option grants and stock purchase rights, which requires compensation expense related to share-based transactions, including employee stock options and stock purchase rights under our ESPP, to be measured and recognized in the financial statements based on fair value. Under ASC 718, the fair value of each option award is estimated on the grant date using the Black-Scholes option pricing model.

Advertising Expense

Advertising Expense—Advertising costs are expensed when incurred and is included in operating expenses in the accompanying consolidated statements of operations. Our advertising expenses were not significant for any periods presented.

Research and Development Costs

Research and Development Costs—Research and development costs are expensed as incurred.

Software Development Costs

Software Development Costs—The costs to develop software have not been capitalized as we believe our current software development process is essentially completed concurrent with the establishment of technological feasibility.

Accounts Receivable

Accounts Receivable—Trade accounts receivable are recorded at the invoiced amount, net of allowances for doubtful accounts and reserves for sales returns and allowances. The allowance for doubtful accounts is based on our assessment of the collectability of customer accounts. We regularly review the allowance by considering factors such as historical experience, credit quality, age of the accounts receivable balances and current economic conditions that may affect a customer's ability to pay. The reserve for sales returns and allowances is based on specific criteria including agreements to provide rebates and other factors known at the time, as well as estimates of the amount of goods shipped that will be returned. To determine the adequacy of the reserves for sales returns and allowances, we analyze historical experience of actual rebates and returns as well as current product return information.

Warranties

Warranties—We generally provide a one-year warranty on hardware products and a 90-day warranty on software. A provision for estimated future costs related to warranty activities is recorded as a component of cost of product revenues when the product revenues are recognized, based upon historical product failure rates and historical costs incurred in correcting product failures. In the event we change our warranty reserve estimates, the resulting charge against future cost of sales or reversal of previously recorded charges may materially affect our gross margins and operating results.

Foreign Currency Derivatives

Foreign Currency Derivatives—Our sales contracts are primarily denominated in U.S. dollars and therefore substantially all of our revenue is not subject to foreign currency translation risk. However, a substantial portion of our operating expenses incurred outside the U.S. are denominated in foreign currencies and are subject to fluctuations due to changes in foreign currency exchange rates, particularly changes in the CAD, EUR, GBP, and JPY. To help protect against significant fluctuations in value and the volatility of future cash flows caused by changes in currency exchange rates, we engage in foreign currency risk management activities to hedge balance sheet items denominated in EUR, GBP, and CAD. We do not use these contracts for speculative or trading purposes. All of the derivative instruments are with high quality financial institutions and we monitor the creditworthiness of these parties. These contracts typically have maturities between one and three months. We account for our hedges under ASC 815 Derivatives and Hedging. We record changes in the fair value of forward exchange contracts related to balance sheet accounts as other income (expense), net in the consolidated statement of operations.

Additionally, independent of any hedging activities, fluctuations in foreign currency exchange rates may cause us to recognize transaction gains and losses in our consolidated statements of operations. Our hedging activities are intended to reduce, but not eliminate, the impact of currency exchange rate movements. As our hedging activities are relatively short-term in nature, long-term material changes in the value of the U.S. dollar versus the EUR, GBP, CAD or JPY could adversely impact our operating expenses in the future.

Income Taxes , Reconciliation of Pre-Tax Income(Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
Domestic	$ 85,411	$ 50,556	$ 22,667
Foreign	6,662	5,785	4,846
INCOME BEFORE INCOME TAXES	$ 92,073	$ 56,341	$ 27,513

Summary of Significant Accounting Policies , Revenue Recognition (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Deferred Revenue Arrangement [Line Items]
Increase (Decrease) in Deferred Revenue	$ 42,177	$ 50,701	$ 30,313
Accounting Standards Update 2009-13 And 2009-14 [Member]
Deferred Revenue Arrangement [Line Items]
Increase (Decrease) in Deferred Revenue	$ 20,000
Minimum [Member]
Deferred Revenue Arrangement [Line Items]
Payment Term, Invoice	30 days	30 days	30 days
Maximum [Member]
Deferred Revenue Arrangement [Line Items]
Payment Term, Invoice	90 days	90 days	90 days

Consolidated Statements of Stockholders' Equity (Deficit) and Comphrensive Income - USD ($) shares in Thousands, $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Preferred Stock [Member]	Preferred Stock [Member] Preferred Stock [Member]	Common Stock [Member]	Treasury Stock [Member]	Treasury Stock [Member] Common Stock [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] Preferred Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Comprehensive Income [Member]	Initial Public Offering [Member]	Initial Public Offering [Member] Common Stock [Member]	Initial Public Offering [Member] Additional Paid-in Capital [Member]	Issuance of Stock Resulting From the Settlement of Litigation Dispute [Member]	Issuance of Stock Resulting From the Settlement of Litigation Dispute [Member] Common Stock [Member]	Issuance of Stock Resulting From the Settlement of Litigation Dispute [Member] Additional Paid-in Capital [Member]
Balance, shares at Dec. 28, 2008				80,960		41,440	0
Balance at Dec. 28, 2008	$ (5,229)			$ 94,368		$ 41	$ 0		$ 20,813		$ (300)	$ (120,151)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of shares (in shares)					(6,008)			(1,409)
Repurchase of shares		$ (12,768)	$ (2,995)		$ (3,183)			$ (2,995)		$ (9,585)
Convertible preferred shares converted to common shares in connection with initial public offering (in shares)				(74,952)		74,952
Convertible preferred shares converted to common shares in connection with initial public offering	0			$ (91,185)		$ 75			91,110
Proceeds from issuance of common stock (in shares)															15,314			200
Proceeds from issuance of common stock														$ 87,388	$ 15	$ 87,373	$ 162		$ 162
Exercise of warrants (in shares)						300
Exercise of warrants	1,876					$ 1			1,875
Exercise of stock options (in shares)						2,828
Exercise of stock options	2,695					$ 3			2,692
Warrants issued	725								725
Stock-based compensation	7,461								7,461
Income tax benefit from employee stock option plans	1,574								1,574
Net unrealized gain (loss) on investments—net of taxes	(33)										(33)		$ (33)
Net change in cumulative translation adjustments	1,417										1,417		1,417
Net Income	60,179											60,179	60,179
Comprehensive income													61,563
Balance, shares at Dec. 31, 2009				0		135,034	(1,409)
Balance at Dec. 31, 2009	142,452			$ 0		$ 135	$ (2,995)		204,200		1,084	(59,972)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options and warrants (in shares)						15,138
Exercise of stock options and warrants	29,109					$ 15			29,094
Stock-based compensation	9,315								9,315
Income tax benefit from employee stock option plans	9,235								9,235
Net unrealized gain (loss) on investments—net of taxes	98										98		98
Net unrealized gain (loss) on derivatives qualifying as cash flow hedges	74										74		74
Net change in cumulative translation adjustments	925										925		925
Net Income	41,245											41,245	41,245
Comprehensive income													42,342
Balance, shares at Dec. 31, 2010				0		150,172	(1,409)
Balance at Dec. 31, 2010	232,454			$ 0		$ 150	$ (2,995)		251,844		2,181	(18,727)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)						6,229
Exercise of stock options	19,968					$ 6			19,962
Stock-based compensation	19,015								19,015
Income tax benefit from employee stock option plans	26,205								26,205
Net unrealized gain (loss) on investments—net of taxes	(1,153)										(1,153)		(1,153)
Net unrealized gain (loss) on derivatives qualifying as cash flow hedges	(74)										(74)		(74)
Net change in cumulative translation adjustments	(552)										(552)		(552)
Net Income	62,492											62,492	62,492
Comprehensive income													$ 60,713
Balance, shares at Dec. 31, 2011				0		156,401	(1,409)
Balance at Dec. 31, 2011	$ 358,354			$ 0		$ 156	$ (2,995)		$ 317,026		$ 402	$ 43,765

Stock Plans (Tables)

12 Months Ended

Dec. 31, 2011

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions And Allocation of Recognized Period Costs [Table Text Block]

The following table summarizes the weighted-average assumptions relating to our stock options as follows:



	Fiscal Year
	2011	2010	2009
Expected term in years	4.1 – 4.6	4.6	4.5 – 4.6
Volatility (%)	40 – 57	38 – 43	43 – 52
Risk-free interest rate (%)	0.6 – 2.0	1.1 – 2.4	1.3 – 2.3
Dividend rate (%)	—	—	—

Stock-based compensation expense is included in costs and expenses as follows ($ amounts in 000's):

	Fiscal Year
	2011	2010	2009
Cost of product revenue	183	101	102
Cost of services revenue	1,790	929	658
Research and development	4,691	2,339	1,963
Sales and marketing	9,325	3,810	3,020
General and administrative	3,026	2,136	1,718
Total stock-based compensation	19,015	9,315	7,461

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

A summary of the option activity under our stock plans and changes during the reporting periods are presented below (in 000's, except per share amounts):



			Options Outstanding
	Shares Available for Grant		Number of Shares		Weighted- Average Exercise Price ($)	Weighted- Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value ($)
Balance—December 28, 2008 (18,250 shares were vested at a weighted-average exercise price of $1.13 per share)	10,095		31,466		2.06
Additional shares authorized	13,774		—		—
Granted (weighted-average fair value of $1.43 per share)	(8,406	)	8,406		4.00
Forfeited	2,634		(2,634	)	3.36
Exercised (aggregate intrinsic value of $10,490)	—		(2,828	)	0.96
Balance—December 31, 2009 (20,504 shares were vested at a weighted-average exercise price of $1.66 per share)	18,097		34,410		2.53
Granted (weighted-average fair value of $3.59 per share)	(4,832	)	4,832		9.70
Forfeited	1,825		(1,825	)	5.56
Exercised (aggregate intrinsic value of $117,934)	—		(14,928	)	1.95
Balance—December 31, 2010	15,090		22,489		4.21
Additional shares authorized	7,438		—		—
Granted (weighted-average fair value of $8.10 per share)	(6,526	)	6,526		21.05
Forfeited	1,397		(1,397	)	11.79
Exercised (aggregate intrinsic value of $113,590)	—		(6,229	)	3.21
Balance—December 31, 2011	17,399		21,389		9.14
Options vested and expected to vest—December 31, 2011			20,394		8.90	4.77	265,552
Options exercisable—December 31, 2011			10,953		3.57	4.16	199,766

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

Additional information regarding options outstanding as of December 31, 2011, is as follows:



	Options Outstanding			Options Exercisable
Exercise Prices ($)	Number Outstanding	Weighted- Average Remaining Contractual Life (Years)	Weighted- Average Exercise Price ($)	Number Exercisable	Weighted- Average Exercise Price ($)
0.08–1.20	3,064	3.17	0.81	3,064	0.81
3.72–4.65	8,724	3.70	3.76	6,696	3.75
5.50–6.25	262	4.82	5.61	97	5.65
8.43–8.99	2,770	5.26	8.58	908	8.55
15.28	581	5.85	15.28	114	15.28
20.12–23.96	5,988	6.36	21.07	74	20.23
	21,389			10,953

Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]

The following table summarizes the weighted-average assumptions relating to our ESPP during fiscal 2011 as follows:



Expected term in years	0.5
Volatility (%)	59.9
Risk-free interest rate (%)	0.07
Dividend rate (%)	—
Estimated fair value ($)	6.56

Summary of Significant Accounting Policies , Warranties (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Movement in Standard Product Warranty Accrual [Roll Forward]
Accrued warranty balance—beginning of the period	$ 1,878	$ 2,257	$ 2,882
Warranty costs incurred	(1,778)	(1,337)	(1,502)
Provision for warranty for the year	2,103	1,069	1,169
Accruals related to changes in estimates	379	(111)	(292)
Accrued warranty balance—end of the period	$ 2,582	$ 1,878	$ 2,257
Hardware, Product Warranty [Member]
Warranties [Line Items]
Warranty Length	1 year	1 year	1 year
Software, Product Warranty [Member]
Warranties [Line Items]
Warranty Length	90 days	90 days	90 days

Income Per Share , Calculation of Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	1 Months Ended	12 Months Ended
	Nov. 30, 2009	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Earnings Per Share [Line Items]
Net Income		$ 62,492	$ 41,245	$ 60,179
Premium paid on repurchase of convertible preferred shares		0	0	(9,266)
Net income attributable to common stockholders-basic		62,492	41,245	50,913
Net income attributable to common stockholders-diluted		$ 62,492	$ 41,245	$ 50,913
Basic shares:
Weighted-average common shares outstanding-basic (in shares)		152,581	140,726	52,668
Diluted shares:
Weighted-average common shares outstanding-basic (in shares)		152,581	140,726	52,668
Effect of potentially dilutive securities:
Warrants to purchase common stock (in shares)		0	156	38
Convertible preferred stock (in shares)		0	0	65,990
Weighted-average shares used to compute diluted net income per share (in shares)		163,781	156,406	130,438
Basic (in dollars per share)		$ 0.41	$ 0.29	$ 0.97
Diluted (in dollars per share)		$ 0.38	$ 0.26	$ 0.39
Employee stock options [Member]
Effect of potentially dilutive securities:
Employee stock options and purchase rights (in shares)		11,200	15,524	11,742
Employee stock purchase rights [Member]
Effect of potentially dilutive securities:
Employee stock options and purchase rights (in shares)		0	0	0
Series A Preferred Stock [Member] \| Convertible Preferred Stock [Member]
Earnings Per Share [Line Items]
Annual non-cumulative dividends (in dollars per share)	$ 0.02
Series B Preferred Stock [Member] \| Convertible Preferred Stock [Member]
Earnings Per Share [Line Items]
Annual non-cumulative dividends (in dollars per share)	0.05
Series C Preferred Stock [Member] \| Convertible Preferred Stock [Member]
Earnings Per Share [Line Items]
Annual non-cumulative dividends (in dollars per share)	0.12
Series D Preferred Stock [Member] \| Convertible Preferred Stock [Member]
Earnings Per Share [Line Items]
Annual non-cumulative dividends (in dollars per share)	0.12
Series E Preferred Stock [Member] \| Convertible Preferred Stock [Member]
Earnings Per Share [Line Items]
Annual non-cumulative dividends (in dollars per share)	$ 0.30

Financial Instruments and Fair Value

12 Months Ended

Dec. 31, 2011

Financial Instruments and Fair Value [Abstract]

FINANCIAL INSTRUMENTS AND FAIR VALUE

The following table summarizes our investments ($ amounts in 000's):



	December 31, 2011
	Amortized Cost	Unrealized Gains	Unrealized Losses		Fair Value
U.S. government and agency securities	38,900	10	(2	)	38,908
Corporate debt securities	339,110	219	(1,832	)	337,497
Commercial paper	51,025	7	(5	)	51,027
Municipal bonds	20,473	36	(5	)	20,504
Certificates of deposit and term deposits	18,762	1	(2	)	18,761
Total	468,270	273	(1,846	)	466,697

	December 31, 2010
	Amortized Cost	Unrealized Gains	Unrealized Losses		Fair Value
U.S. government and agency securities	51,989	—	(46	)	51,943
Corporate debt securities	213,237	159	—		213,396
Commercial paper	38,914	5	—		38,919
Municipal bonds	11,069	11	—		11,080
Certificates of deposit and term deposits	5,263	—	—		5,263
Total	320,472	175	(46	)	320,601

The following table shows the gross unrealized losses and fair values of our investments, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at December 31, 2011 ($ amounts in 000's):



	Less Than 12 Months			12 Months or Greater		Total
	Fair Value	Unrealized Losses		Fair Value	Unrealized Losses	Fair Value	Unrealized Losses
U.S. government and agency securities	10,996	(2	)	—	—	10,996	(2	)
Corporate debt securities	258,159	(1,832	)	—	—	258,159	(1,832	)
Commercial paper	9,279	(5	)	—	—	9,279	(5	)
Municipal bonds	8,067	(5	)	—	—	8,067	(5	)
Certificates of deposit and term deposits	7,499	(2	)	—	—	7,499	(2	)
Total available-for-sale securities	294,000	(1,846	)	—	—	294,000	(1,846	)

The contractual maturities of our investments are as follows ($ amounts in 000's)



	December 31, 2011	December 31, 2010
Due within one year	318,283	246,651
Due after one year	148,414	73,950
Total	466,697	320,601

Available-for-sale securities are reported at fair value, with unrealized gains and losses, net of tax, included as a separate component of stockholders’ equity (deficit) and in total comprehensive income. Realized gains and losses on available-for-sale securities are included in other income (expense), net in our consolidated statements of operations.

Realized gains and losses from the sale of available-for-sale securities were not significant in any period presented.

Fair Value Accounting—We apply ASC 820 which establishes a valuation hierarchy for disclosure of the inputs to fair value measurement. This hierarchy prioritizes the inputs into three broad levels as follows:

Level 1—Inputs are unadjusted quoted prices in active markets for identical assets or liabilities.

Level 2—Inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the assets or liabilities, either directly or indirectly through market corroboration, for substantially the full term of the financial instruments.

Level 3—Unobservable inputs based on our own assumptions used to measure assets and liabilities at fair value. The inputs require significant management judgment or estimation.

We measure the fair value of money market funds using quoted prices in active markets for identical assets. The fair value of all other financial instruments was based on quoted prices for similar asserts in active markets, or model driven valuations using significant inputs derived from or corroborated by observable market data.

We classify investments within Level 1 if quoted prices are available in active markets for identical securities.

We classify items within Level 2 if the investments are valued using model driven valuations using observable inputs such as quoted market prices, benchmark yields, reported trades, broker/dealer quotes or alternative pricing sources with reasonable levels of price transparency. Investments are held by custodians who obtain investment prices from a third-party pricing provider that incorporates standard inputs in various asset price models.

The following table presents the fair value of our financial assets as of December 31, 2011 and December 31, 2010 using the ASC 820 input categories:



	December 31, 2011			December 31, 2010
	Aggregate Fair Value	Quoted Prices in Active Markets For Identical Assets	Significant Other Observable Remaining Inputs	Aggregate Fair Value	Quoted Prices in Active Markets For Identical Assets	Significant Other Observable Remaining Inputs
		(Level 1)	(Level 2)		(Level 1)	(Level 2)
Assets:
U.S. government and agency securities	38,908	—	38,908	51,943	—	51,943
Corporate debt securities	337,497	—	337,497	213,396	—	213,396
Commercial paper	64,890	—	64,890	52,415	—	52,415
Municipal bonds	20,504	—	20,504	11,080	—	11,080
Certificates of deposit and term deposits	18,761	—	18,761	5,263	—	5,263
Money market funds	31,438	31,438	—	7,078	7,078	—
Foreign currency contracts	—	—	—	74	—	74
Total	511,998	31,438	480,560	341,249	7,078	334,171
Reported as:
Cash equivalents	45,301			20,574
Short-term investments	318,283			246,651
Prepaid expenses and other current assets	—			74
Long-term investments	148,414			73,950
Total	511,998			341,249

Subsequent to the issuance of the 2010 consolidated financial statements, we determined that $5.3 million of term deposits classified as Level 1 investments as of December 31, 2010 should have been classified as Level 2 as these investments are not actively traded. Accordingly, we have corrected the classification of term deposits from Level 1 to Level 2 in the table of fair value measurements as of December 31, 2010.

We did not hold financial assets or liabilities which were recorded at fair value using inputs in the Level 3 category as of December 31, 2011 and December 31, 2010. There were no transfers between Level 1 and Level 2 of the fair value hierarchy during the year ended December 31, 2011.

Stock Plans , Range of Options (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2011 yr $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Number Outstanding (in shares) \| shares	21,389
Options Exercisable, Number Exericsable (in shares) \| shares	10,953
Range, 0.08 to 1.20 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price, minimum (in dollars per share)	$ 0.08
Exercise Price, maximum (in dollars per share)	$ 1.20
Options Outstanding, Number Outstanding (in shares) \| shares	3,064
Options Outstanding, Weighted Average Remaining Contractual Life (in years) \| yr	3.17
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 0.81
Options Exercisable, Number Exericsable (in shares) \| shares	3,064
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 0.81
Range, 3.72 to 4.65 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price, minimum (in dollars per share)	3.72
Exercise Price, maximum (in dollars per share)	$ 4.65
Options Outstanding, Number Outstanding (in shares) \| shares	8,724
Options Outstanding, Weighted Average Remaining Contractual Life (in years) \| yr	3.70
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 3.76
Options Exercisable, Number Exericsable (in shares) \| shares	6,696
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 3.75
Range, 5.50 to 6.25 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price, minimum (in dollars per share)	5.50
Exercise Price, maximum (in dollars per share)	$ 6.25
Options Outstanding, Number Outstanding (in shares) \| shares	262
Options Outstanding, Weighted Average Remaining Contractual Life (in years) \| yr	4.82
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 5.61
Options Exercisable, Number Exericsable (in shares) \| shares	97
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 5.65
Range, 8.43 to 8.99 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price, minimum (in dollars per share)	8.43
Exercise Price, maximum (in dollars per share)	$ 8.99
Options Outstanding, Number Outstanding (in shares) \| shares	2,770
Options Outstanding, Weighted Average Remaining Contractual Life (in years) \| yr	5.26
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 8.58
Options Exercisable, Number Exericsable (in shares) \| shares	908
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 8.55
Range, 15.28 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price, minimum (in dollars per share)	15.28
Exercise Price, maximum (in dollars per share)	$ 15.28
Options Outstanding, Number Outstanding (in shares) \| shares	581
Options Outstanding, Weighted Average Remaining Contractual Life (in years) \| yr	5.85
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 15.28
Options Exercisable, Number Exericsable (in shares) \| shares	114
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 15.28
Range, 20.12 to 23.96 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price, minimum (in dollars per share)	20.12
Exercise Price, maximum (in dollars per share)	$ 23.96
Options Outstanding, Number Outstanding (in shares) \| shares	5,988
Options Outstanding, Weighted Average Remaining Contractual Life (in years) \| yr	6.36
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 21.07
Options Exercisable, Number Exericsable (in shares) \| shares	74
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 20.23

Income Taxes

12 Months Ended

Dec. 31, 2011

Income Tax Disclosure [Abstract]

INCOME TAXES

The pre-tax income for the periods ended is as follows ($ amounts in 000's):



	December 31, 2011	December 31, 2010	December 31, 2009
Domestic	85,411	50,556	22,667
Foreign	6,662	5,785	4,846
Total Pre-Tax Income	92,073	56,341	27,513

The provision for income taxes for the years ended is as follows ($ amounts in 000's):



	December 31, 2011		December 31, 2010		December 31, 2009
Current:
Federal	34,856		10,633		4,882
State	2,785		(82	)	1,003
Foreign	1,402		9,298		1,173
Total current	39,043		19,849		7,058
Deferred:
Federal	(9,326	)	(4,119	)	(35,331	)
State	(136	)	(626	)	(3,850	)
Foreign	—		(8	)	(543	)
Total deferred	(9,462	)	(4,753	)	(39,724	)
Provision for (benefit from) income taxes	29,581		15,096		(32,666	)

The provision for income taxes differs from the amount computed by applying the statutory federal income tax rate as follows ($ amounts in 000's):



	December 31, 2011		December 31, 2010		December 31, 2009
Tax at federal statutory tax rate	32,225		19,719		9,629
Stock-based compensation expense	(2,457	)	(2,308	)	1,311
State taxes—net of federal benefit	2,222		(1,098	)	821
Research and development credit	(887	)	(948	)	(356	)
Foreign income taxed at different rates	(929	)	(1,066	)	(1,064	)
Other	(593	)	797		1,202
Change in valuation allowance	—		—		(44,209	)
Total provision for income taxes	29,581		15,096		(32,666	)

Significant permanent differences arise from the portion of stock-based compensation expense that is not expected to generate a tax deduction, such as stock compensation expense on stock option grants to certain foreign employees, offset by the actual tax benefits in the current periods from disqualifying dispositions of shares held by our U.S. employees. For stock options exercised by our U.S. employees, we receive an income tax benefit calculated as the difference between the fair market value of the stock issued at the time of the exercise and the option price, tax effected. Due to this, our income taxes payable have been reduced by the tax benefits from employee stock plan awards. The income tax benefits for fiscal 2011, 2010 and 2009 associated with dispositions from employee stock transactions of $26.2 million, $9.3 million and $1.3 million, respectively, were recognized as additional paid-in capital.

As of December 31, 2011, we did not recognize deferred tax assets relating to excess tax benefits for stock-based compensation deductions of $5.5 million and $1.1 million, which related to California net operating losses and California tax credits, respectively. Unrecognized deferred tax benefits will be accounted for as a credit to additional paid-in-capital when realized through a reduction in income taxes payable.

The tax effects of temporary differences that give rise to significant portions of the deferred tax assets as of each of the years ended are presented below ($ amount in 000's):



	December 31, 2011	December 31, 2010
Deferred tax assets:
Net operating loss carryforward	1,830	1,920
Deferred revenue	31,234	25,173
Nondeductible reserves and accruals	13,699	10,990
Depreciation and amortization	684	2,029
General business credit carryforward	396	1,243
Stock-based compensation	6,247	4,225
Other	12	21
Total deferred tax assets	54,102	45,601

In assessing the realizability of deferred tax assets, we considered whether it is more likely than not that some portion or all of our deferred tax assets will be realized. This realization is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Management concluded that it is more likely than not that we would be able to realize the benefit of our deferred tax assets in the future.

As of December 31, 2011, we had various state net operating loss carryforwards of approximately $37.3 million. These state net operating loss carryforwards begin to expire in the year 2012. The state tax authorities impose significant restrictions on the utilization of net operating loss tax credit carryforwards. Our ability to use our net operating loss carryforwards to offset any future taxable income may be subject to limitations if equity transactions occur that would result in a change of ownership. As of December 31, 2011, we have tax credit carryforwards available to offset our future state taxes of approximately $1.6 million. The state credits carry forward indefinitely.

The Company's policy with respect to its undistributed foreign subsidiaries' earnings is to consider those earnings to be indefinitely reinvested and, accordingly, no related provision of U.S. federal and state income taxes has been provided. Upon distribution of those earnings in the form of dividends or otherwise, we will be subject to both U.S. income taxes (subject to an adjustment for foreign tax credits) and withholding taxes in the various foreign countries. At December 31, 2011 we have not recorded U.S. income tax on approximately $24.3 million of foreign earnings that are deemed to be permanently reinvested overseas.

At December 31, 2011, we had $19.3 million of unrecognized tax benefits, of which, if recognized, $18.5 million would favorably affect our effective tax rate. Our policy is to include accrued interest and penalties related to uncertain tax benefits in income tax expense. As of December 31, 2011, accrued interest and penalties were $0.6 million. As of December 31, 2010, accrued interest and penalties were $0.2 million.

The aggregate changes in the balance of unrecognized tax benefits are as follows ($ amounts in 000's):



	Fiscal Year
	2011		2010	2009
Balance, beginning of year	12,083		3,387	1,952
Increases for tax positions related to the current year	9,049		8,696	440
Increases (decreases) for tax positions related to the prior year	(1,863	)	—	995
Balance, end of year	19,269		12,083	3,387

As of December 31, 2011 and December 31, 2010, $19.1 million and $11.2 million, respectively, of the amounts reflected above were recorded as a liability and included in other non-current liabilities in our consolidated balance sheet.

As of December 31, 2011, there were no unrecognized tax benefits that we expect would change significantly over the next 12 months.

We file income tax returns in the U.S. federal jurisdiction, and various U.S. state and foreign jurisdictions. As we have net operating loss carryforwards for the U.S. Federal and state jurisdictions, the statute of limitations is open for all tax years. Generally, we are no longer subject to non-U.S. income tax examinations by tax authorities for tax years prior to 2006.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 136, 172
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 43, 44, 45, 46, 47, 48, 49
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319

+ Details

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
REVENUE:
Product	$ 197,408	$ 135,140	$ 98,686
Services	220,268	172,046	139,172
Ratable and other revenue	15,900	17,510	14,257
Total revenue	433,576	324,696	252,115
COST OF REVENUE:
Product	73,201	51,944	42,166
Services	35,486	26,967	22,265
Ratable and other revenue	4,911	6,295	5,544
Total cost of revenue	113,598	85,206	69,975
GROSS PROFIT:
Product	124,207	83,196	56,520
Services	184,782	145,079	116,907
Ratable and other revenue	10,989	11,215	8,713
Total gross profit	319,978	239,490	182,140
OPERATING EXPENSES:
Research and development	63,577	49,801	42,195
Sales and marketing	145,532	111,968	96,291
General and administrative	21,965	22,380	18,320
Total operating expenses	231,074	184,149	156,806
OPERATING INCOME	88,904	55,341	25,334
INTEREST INCOME	3,523	1,815	1,981
OTHER INCOME (EXPENSE)—Net	(354)	(815)	198
INCOME BEFORE INCOME TAXES	92,073	56,341	27,513
PROVISION FOR (BENEFIT FROM) INCOME TAXES	29,581	15,096	(32,666)
Net Income	$ 62,492	$ 41,245	$ 60,179
Net income per share:
Basic (in dollars per share)	$ 0.41	$ 0.29	$ 0.97
Diluted (in dollars per share)	$ 0.38	$ 0.26	$ 0.39
Weighted-average shares outstanding:
Basic (in shares)	152,581	140,726	52,668
Diluted (in shares)	163,781	156,406	130,438

Summary of Significant Accounting Policies , Fiscal Period (Details)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Fiscal Period [Line Items]
Number of Days in a Fiscal Year	365 days	365 days	368 days
Number of Weeks in a Fiscal Year	P52W	P52W
Minimum [Member]
Fiscal Period [Line Items]
Number of Weeks in a Fiscal Year			P52W
Maximum [Member]
Fiscal Period [Line Items]
Number of Weeks in a Fiscal Year			P53W

Deferred Revenues

12 Months Ended

Dec. 31, 2011

Deferred Revenue Disclosure [Abstract]

DEFERRED REVENUES

Deferred revenues consisted of the following ($ amounts in 000's):



	December 31, 2011	December 31, 2010
Product	5,817	4,466
Services	272,843	219,022
Ratable and other revenue	16,173	29,143
Total deferred revenue	294,833	252,631
Reported As:
Short-term	206,928	169,648
Long-term	87,905	82,983
Total deferred revenue	294,833	252,631

Stock Plans

12 Months Ended

Dec. 31, 2011

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

STOCK PLANS

2000 Stock Plan—During 2000, we adopted the 2000 Stock Option Plan (the Plan), which includes both incentive and non-statutory stock options. Under the Plan, we may grant options to purchase up to 21,500,000 shares of common stock to employees, directors and other service providers at prices not less than the fair market value at date of grant for incentive stock options and not less than 85% of fair market value for non-statutory options. Options granted to a person who, at the time of the grant, owns more than 10% of the voting power of all classes of stock shall be at no less than 110% of the fair market value and expire five years from the date of grant. All other options generally have a contractual term of 10 years. Options generally vest over four years.

2008 Stock Plan—On January 28, 2008, our Board of Directors approved the 2008 Stock Plan (the 2008 Plan) and French Sub-Plan, which includes both incentive and non-statutory stock options. The maximum aggregate number of shares which may be subject to options and sold under the 2008 Plan and the French Sub-Plan is 5,000,000 shares, plus any shares that, as of the date of stockholder approval of the 2008 Plan, have been reserved but not issued under the 2000 Plan or shares subject to stock options or similar awards granted under the 2000 Plan that expire or otherwise terminate without having been exercised in full or that are forfeited to or repurchased by us.

Under the 2008 Plan and the French Sub-Plan, we may grant options to employees, directors and other service providers. In the case of an incentive stock option granted to an employee, who at the time of grant, owns stock representing more than 10% of the total combined voting power of all classes of stock, the exercise price shall be no less than 110% of the fair market value per share on the date of grant and expire five years from the date of grant, and options granted to any other employee, the per share exercise price shall be no less than 100% of the fair market value per share on the date of grant. In the case of a nonstatutory stock option and options granted to other service providers, the per share exercise price shall be no less than 100% of the fair market value per share on the date of grant.

2009 Equity Incentive Plan—On November 17, 2009, our Board of Directors approved the 2009 Equity Incentive Plan (the 2009 Plan) and French Sub-Plan, which includes awards of stock options, stock appreciation rights, restricted stock, restricted stock units, and performance units or performance shares. The maximum aggregate number of shares that may be issued under the Plan is 9,000,000 shares, plus any shares subject to stock options or similar awards granted under the 2008 Stock Plan and the Amended and Restated 2000 Stock Plan that expire or otherwise terminate without having been exercised in full and shares issued pursuant to awards granted under the 2008 Stock Plan and the Amended and Restated 2000 Stock Plan that are forfeited to or repurchased by the Company, with the maximum number of shares to be added to the Plan pursuant to such terminations, forfeitures and repurchases not to exceed 21,000,000 shares. The shares may be authorized, but unissued or reacquired common stock. The number of shares available for issuance under the 2009 Plan will be increased on the first day of each fiscal year beginning with the 2011 fiscal year, in an amount equal to the lesser of (i) 7,000,000 shares, (ii) five percent (5%) of the outstanding shares on the last day of the immediately preceding fiscal year, or (iii) such number of shares determined by the Board.

Under the 2009 Plan and the French Sub-Plan, we may grant awards to employees, directors and other service providers. In the case of an incentive stock option granted to an employee who, at the time of the grant, owns stock representing more than 10% of the voting power of all classes of stock, the exercise price shall be no less than 110% of the fair market value per share on the date of grant and expire five years from the date of grant, and options granted to any other employee, the per share exercise price shall be no less than 100% of the fair market value per share on the date of grant. In the case of a non statutory stock option and options granted to other service providers, the per share exercise price shall be no less than 100% of the fair market value per share on the date of grant. Options granted to individuals owning less than 10% of the total combined voting power of all classes of stock generally have a contractual term of seven years and options generally vest over four years.

Employee Stock Purchase Plan—In June 2011, our stockholders approved the ESPP. The purpose of the ESPP is to provide eligible employees with the opportunity to purchase common stock through regular, systematic payroll deductions, up to a maximum of 15.0% of employees' compensation for each purchase period at purchase prices equal to 85.0% of the lesser of the fair market value of our common stock at the first trading date of the applicable offering period or the purchase date. The first offering period under the ESPP began on August 15, 2011 and ends on February 14, 2012. At December 31, 2011, 8,000,000 shares were authorized and available for issuance.

Stock-based compensation under ASC 718—Stock-based compensation is accounted for in accordance with ASC 718, which requires compensation costs related to share-based transactions, including employee stock options and stock purchase rights, to be recognized in the financial statements based on fair value. Under ASC 718, the fair value of each option award is estimated on the grant date using the Black-Scholes option pricing model. We determined weighted-average valuation assumptions as follows:

Valuation method—We estimate the fair value of stock options granted using the Black-Scholes valuation model.

Expected Term—The expected term represents the period that our stock-based awards are expected to be outstanding. As we do not have sufficient historical experience for determining the expected term of the stock option awards granted, we have based our expected term on the simplified method available under ASC 718-10.

Expected Volatility—The computation of expected volatility for the periods presented includes the historical and implied stock volatility of comparable companies from a representative peer group selected based on industry and market capitalization data and to a lesser extent, our weighted historical volatility following our IPO in November 2009.

Fair Value of Common Stock—The fair value of our common stock is the closing sales price of the Common Stock (or the closing bid, if no sales were reported) on the effective grant date.

Risk-Free Interest Rate—We base the risk-free interest rate used in the Black-Scholes valuation model on the implied yield available on U.S. Treasury zero-coupon issues with an equivalent remaining term.

Expected Dividend—The expected dividend weighted-average assumption is based on our current expectations about our anticipated dividend policy.

The following table summarizes the weighted-average assumptions relating to our stock options as follows:



	Fiscal Year
	2011	2010	2009
Expected term in years	4.1 – 4.6	4.6	4.5 – 4.6
Volatility (%)	40 – 57	38 – 43	43 – 52
Risk-free interest rate (%)	0.6 – 2.0	1.1 – 2.4	1.3 – 2.3
Dividend rate (%)	—	—	—

Stock-based compensation expense is included in costs and expenses as follows ($ amounts in 000's):

	Fiscal Year
	2011	2010	2009
Cost of product revenue	183	101	102
Cost of services revenue	1,790	929	658
Research and development	4,691	2,339	1,963
Sales and marketing	9,325	3,810	3,020
General and administrative	3,026	2,136	1,718
Total stock-based compensation	19,015	9,315	7,461

A summary of the option activity under our stock plans and changes during the reporting periods are presented below (in 000's, except per share amounts):



			Options Outstanding
	Shares Available for Grant		Number of Shares		Weighted- Average Exercise Price ($)	Weighted- Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value ($)
Balance—December 28, 2008 (18,250 shares were vested at a weighted-average exercise price of $1.13 per share)	10,095		31,466		2.06
Additional shares authorized	13,774		—		—
Granted (weighted-average fair value of $1.43 per share)	(8,406	)	8,406		4.00
Forfeited	2,634		(2,634	)	3.36
Exercised (aggregate intrinsic value of $10,490)	—		(2,828	)	0.96
Balance—December 31, 2009 (20,504 shares were vested at a weighted-average exercise price of $1.66 per share)	18,097		34,410		2.53
Granted (weighted-average fair value of $3.59 per share)	(4,832	)	4,832		9.70
Forfeited	1,825		(1,825	)	5.56
Exercised (aggregate intrinsic value of $117,934)	—		(14,928	)	1.95
Balance—December 31, 2010	15,090		22,489		4.21
Additional shares authorized	7,438		—		—
Granted (weighted-average fair value of $8.10 per share)	(6,526	)	6,526		21.05
Forfeited	1,397		(1,397	)	11.79
Exercised (aggregate intrinsic value of $113,590)	—		(6,229	)	3.21
Balance—December 31, 2011	17,399		21,389		9.14
Options vested and expected to vest—December 31, 2011			20,394		8.90	4.77	265,552
Options exercisable—December 31, 2011			10,953		3.57	4.16	199,766

At December 31, 2011, total compensation cost related to unvested stock-based awards granted to employees under our stock plans but not yet recognized was $53.0 million, net of estimated forfeitures. This cost is expected to be amortized on a straight-line basis over a weighted-average period of 3.0 years. Future option grants will increase the amount of compensation expense to be recorded in these periods.

The total fair value of awards vested under our stock plans was $11.8 million, $8.5 million and $5.5 million for fiscal 2011, 2010 and 2009, respectively.

Additional information regarding options outstanding as of December 31, 2011, is as follows:



	Options Outstanding			Options Exercisable
Exercise Prices ($)	Number Outstanding	Weighted- Average Remaining Contractual Life (Years)	Weighted- Average Exercise Price ($)	Number Exercisable	Weighted- Average Exercise Price ($)
0.08–1.20	3,064	3.17	0.81	3,064	0.81
3.72–4.65	8,724	3.70	3.76	6,696	3.75
5.50–6.25	262	4.82	5.61	97	5.65
8.43–8.99	2,770	5.26	8.58	908	8.55
15.28	581	5.85	15.28	114	15.28
20.12–23.96	5,988	6.36	21.07	74	20.23
	21,389			10,953

Employee Stock Purchase Plan—During fiscal 2011, compensation expense recognized in connection with the ESPP was $1.6 million. The following table summarizes the weighted-average assumptions relating to our ESPP during fiscal 2011 as follows:



Expected term in years	0.5
Volatility (%)	59.9
Risk-free interest rate (%)	0.07
Dividend rate (%)	—
Estimated fair value ($)	6.56

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph 64, 65, A240
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 93-6
-Paragraph 53
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 50
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 40
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929

+ Details

Deferred Revenues (Tables)

12 Months Ended

Dec. 31, 2011

Deferred Revenue Disclosure [Abstract]

Deferred Revenue, by Arrangement, Disclosure [Table Text Block]

Deferred revenues consisted of the following ($ amounts in 000's):



	December 31, 2011	December 31, 2010
Product	5,817	4,466
Services	272,843	219,022
Ratable and other revenue	16,173	29,143
Total deferred revenue	294,833	252,631
Reported As:
Short-term	206,928	169,648
Long-term	87,905	82,983
Total deferred revenue	294,833	252,631

Financial Instruments and Fair Value (Tables)

12 Months Ended

Dec. 31, 2011

Financial Instruments and Fair Value [Abstract]

Summary of Investments [Table Text Block]

The following table summarizes our investments ($ amounts in 000's):



	December 31, 2011
	Amortized Cost	Unrealized Gains	Unrealized Losses		Fair Value
U.S. government and agency securities	38,900	10	(2	)	38,908
Corporate debt securities	339,110	219	(1,832	)	337,497
Commercial paper	51,025	7	(5	)	51,027
Municipal bonds	20,473	36	(5	)	20,504
Certificates of deposit and term deposits	18,762	1	(2	)	18,761
Total	468,270	273	(1,846	)	466,697

	December 31, 2010
	Amortized Cost	Unrealized Gains	Unrealized Losses		Fair Value
U.S. government and agency securities	51,989	—	(46	)	51,943
Corporate debt securities	213,237	159	—		213,396
Commercial paper	38,914	5	—		38,919
Municipal bonds	11,069	11	—		11,080
Certificates of deposit and term deposits	5,263	—	—		5,263
Total	320,472	175	(46	)	320,601

Schedule of Unrealized Loss on Investments [Table Text Block]



	Less Than 12 Months			12 Months or Greater		Total
	Fair Value	Unrealized Losses		Fair Value	Unrealized Losses	Fair Value	Unrealized Losses
U.S. government and agency securities	10,996	(2	)	—	—	10,996	(2	)
Corporate debt securities	258,159	(1,832	)	—	—	258,159	(1,832	)
Commercial paper	9,279	(5	)	—	—	9,279	(5	)
Municipal bonds	8,067	(5	)	—	—	8,067	(5	)
Certificates of deposit and term deposits	7,499	(2	)	—	—	7,499	(2	)
Total available-for-sale securities	294,000	(1,846	)	—	—	294,000	(1,846	)

Investments Classified by Contractual Maturity Date [Table Text Block]

The contractual maturities of our investments are as follows ($ amounts in 000's)



	December 31, 2011	December 31, 2010
Due within one year	318,283	246,651
Due after one year	148,414	73,950
Total	466,697	320,601

Fair Value, by Balance Sheet Grouping and Measurement Inputs, Disclosure [Table Text Block]

The following table presents the fair value of our financial assets as of December 31, 2011 and December 31, 2010 using the ASC 820 input categories:



	December 31, 2011			December 31, 2010
	Aggregate Fair Value	Quoted Prices in Active Markets For Identical Assets	Significant Other Observable Remaining Inputs	Aggregate Fair Value	Quoted Prices in Active Markets For Identical Assets	Significant Other Observable Remaining Inputs
		(Level 1)	(Level 2)		(Level 1)	(Level 2)
Assets:
U.S. government and agency securities	38,908	—	38,908	51,943	—	51,943
Corporate debt securities	337,497	—	337,497	213,396	—	213,396
Commercial paper	64,890	—	64,890	52,415	—	52,415
Municipal bonds	20,504	—	20,504	11,080	—	11,080
Certificates of deposit and term deposits	18,761	—	18,761	5,263	—	5,263
Money market funds	31,438	31,438	—	7,078	7,078	—
Foreign currency contracts	—	—	—	74	—	74
Total	511,998	31,438	480,560	341,249	7,078	334,171
Reported as:
Cash equivalents	45,301			20,574
Short-term investments	318,283			246,651
Prepaid expenses and other current assets	—			74
Long-term investments	148,414			73,950
Total	511,998			341,249

- Definition

Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References + Details

Stockholder's Equity (Details) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended
	Jun. 17, 2009	Dec. 31, 2011
Equity, Class of Treasury Stock [Line Items]
Common shares reserved for future issuance, (in shares)		46,789,659
Stock repurchase authorization, authorized amount	$ 20.0
Stock repuchase authorization, (in dollars per share)	$ 4.25
Payments for repurchase of common and convertible preferred stock	$ 15.7
Common Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Repurchase of common stock, (in shares)	1,409,264
Convertible Preferred Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Repurchase and retirement of preferred shares (in shares)	6,008,330

Financial Instruments and Fair Value , Fair Value Measurements (Details) - Recurring [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Estimate of Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts, Asset, Fair Value Disclosure	$ 0	$ 74
Total Assets, Fair Value Disclosure	511,998	341,249
Estimate of Fair Value [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts, Asset, Fair Value Disclosure	0	0
Total Assets, Fair Value Disclosure	31,438	7,078
Estimate of Fair Value [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts, Asset, Fair Value Disclosure	0	74
Total Assets, Fair Value Disclosure	480,560	334,171
Estimate of Fair Value [Member] \| U.S. government and agency securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, Fair Value Disclosure	38,908	51,943
Estimate of Fair Value [Member] \| U.S. government and agency securities [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, Fair Value Disclosure	0	0
Estimate of Fair Value [Member] \| U.S. government and agency securities [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, Fair Value Disclosure	38,908	51,943
Estimate of Fair Value [Member] \| Corporate debt securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, Fair Value Disclosure	337,497	213,396
Estimate of Fair Value [Member] \| Corporate debt securities [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, Fair Value Disclosure	0	0
Estimate of Fair Value [Member] \| Corporate debt securities [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, Fair Value Disclosure	337,497	213,396
Estimate of Fair Value [Member] \| Commercial paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, Fair Value Disclosure	64,890	52,415
Estimate of Fair Value [Member] \| Commercial paper [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, Fair Value Disclosure	0	0
Estimate of Fair Value [Member] \| Commercial paper [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, Fair Value Disclosure	64,890	52,415
Estimate of Fair Value [Member] \| Municipal bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, Fair Value Disclosure	20,504	11,080
Estimate of Fair Value [Member] \| Municipal bonds [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, Fair Value Disclosure	0	0
Estimate of Fair Value [Member] \| Municipal bonds [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, Fair Value Disclosure	20,504	11,080
Estimate of Fair Value [Member] \| Certificates of deposit and term deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, Fair Value Disclosure	18,761	5,263
Estimate of Fair Value [Member] \| Certificates of deposit and term deposits [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, Fair Value Disclosure	0	0
Estimate of Fair Value [Member] \| Certificates of deposit and term deposits [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, Fair Value Disclosure	18,761	5,263
Fair Value, Level 1 to level 2 Transfers, Amount	5,300
Estimate of Fair Value [Member] \| Money market funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, Fair Value Disclosure	31,438	7,078
Estimate of Fair Value [Member] \| Money market funds [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, Fair Value Disclosure	31,438	7,078
Estimate of Fair Value [Member] \| Money market funds [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, Fair Value Disclosure	0	0
Reported as [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets, Fair Value Disclosure	511,998	341,249
Reported as [Member] \| Cash equivalents [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, Fair Value Disclosure	45,301	20,574
Reported as [Member] \| Short-term investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, Fair Value Disclosure	318,283	246,651
Reported as [Member] \| Prepaid expenses and other current assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts, Asset, Fair Value Disclosure	0	74
Reported as [Member] \| Long-term investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, Fair Value Disclosure	$ 148,414	$ 73,950

Summary of Significant Accounting Policies , Foreign Currency Translation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accounting Policies [Abstract]
Foreign Currency Transaction Gain (Loss), before Tax	$ (0.4)	$ (0.8)	$ 0.1

- Definition

The aggregate foreign currency transaction gain (loss) (both realized and unrealized) included in determining net income for the reporting period. Excludes foreign currency transactions designated as hedges of net investment in a foreign entity and intercompany foreign currency transactions that are of a long-term nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements. For certain enterprises, primarily banks, that are dealers in foreign exchange, foreign currency transaction gains (losses) may be disclosed as dealer gains (losses).

+ References + Details

Commitments and Contingencies (Details) $ in Thousands	1 Months Ended	12 Months Ended
Commitments and Contingencies (Details) $ in Thousands	Dec. 31, 2011 USD ($)	Dec. 31, 2011 USD ($) patent	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)	Dec. 20, 2011 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Rent expense		$ 8,200	$ 7,000	$ 6,100
Fiscal Years:
Rental Payment, 2012	$ 7,308	7,308
Rental Payment, 2013	4,712	4,712
Rental Payment, 2014	3,041	3,041
Rental Payment, 2015	1,604	1,604
Rental Payment, Total	16,665	16,665
Open purchase orders with our independent contract manufactures	26,000	26,000
Settlement aggrement	9,000
Litigation accrued liability					$ 7,200
Litigation payment in prepaid asset	$ 1,800	$ 1,800
Amortization Period of Prepaid Asset		4 years
Number of Patents Involved in Litigation \| patent		2

Inventory (Tables)

12 Months Ended

Dec. 31, 2011

Inventory Disclosure [Abstract]

Inventory [Table Text Block]

Inventory consisted of the following ($ amounts in 000's):



	December 31, 2011	December 31, 2010
Raw materials	3,447	2,593
Finished goods	12,802	10,924
Inventory	16,249	13,517

Income Per Share , Anti Dilutive Securities (Details) - Stock Compensation Plan [Member] - shares shares in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Employee stock options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	3,893	3,006	9,168
Employee stock purchase rights [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	122	0	0

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 13, 14
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 171
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Diluted Earnings Per Share
-URI http://asc.fasb.org/extlink&oid=6510752

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Contingent Stock Agreement
-URI http://asc.fasb.org/extlink&oid=6508534

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Antidilution
-URI http://asc.fasb.org/extlink&oid=6505113

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 07-4
-Paragraph 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Income Per Share (Tables)

12 Months Ended

Dec. 31, 2011

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

A reconciliation of the numerator and denominator used in the calculation of basic and diluted net income per share follows ($ and share amounts in 000's, except per share amounts):



	Fiscal Year
	2011	2010	2009
Numerator:
Net income	62,492	41,245	60,179
Premium paid on repurchase of convertible preferred shares	—	—	(9,266	)
Net income attributable to common stockholders-basic and diluted	62,492	41,245	50,913

Denominator:
Basic shares:
Weighted-average common shares outstanding-basic	152,581	140,726	52,668
Diluted shares:
Weighted-average common shares outstanding-basic	152,581	140,726	52,668
Effect of potentially dilutive securities:
Employee stock options	11,200	15,524	11,742
Employee stock purchase rights	—	—	—
Warrants to purchase common stock	—	156	38
Convertible preferred stock	—	—	65,990
Weighted-average shares used to compute diluted net income per share	163,781	156,406	130,438
Net income per share attributable to common stockholders:
Basic	0.41	0.29	0.97
Diluted	0.38	0.26	0.39

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]



	Fiscal Year
	2011	2010	2009
Options to purchase common stock	3,893	3,006	9,168
Employee stock purchase rights	122	—	—

Schedule II (Details) - Allowance for Doubtful Accounts [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	$ 303	$ 367	$ 318
Charged to costs and expenses	159	8	161
Bad debt write-offs	(126)	(72)	(112)
Ending balance	$ 336	$ 303	$ 367

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2011

Income Tax Disclosure [Abstract]

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

The pre-tax income for the periods ended is as follows ($ amounts in 000's):



	December 31, 2011	December 31, 2010	December 31, 2009
Domestic	85,411	50,556	22,667
Foreign	6,662	5,785	4,846
Total Pre-Tax Income	92,073	56,341	27,513

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

The provision for income taxes for the years ended is as follows ($ amounts in 000's):



	December 31, 2011		December 31, 2010		December 31, 2009
Current:
Federal	34,856		10,633		4,882
State	2,785		(82	)	1,003
Foreign	1,402		9,298		1,173
Total current	39,043		19,849		7,058
Deferred:
Federal	(9,326	)	(4,119	)	(35,331	)
State	(136	)	(626	)	(3,850	)
Foreign	—		(8	)	(543	)
Total deferred	(9,462	)	(4,753	)	(39,724	)
Provision for (benefit from) income taxes	29,581		15,096		(32,666	)

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

The provision for income taxes differs from the amount computed by applying the statutory federal income tax rate as follows ($ amounts in 000's):



	December 31, 2011		December 31, 2010		December 31, 2009
Tax at federal statutory tax rate	32,225		19,719		9,629
Stock-based compensation expense	(2,457	)	(2,308	)	1,311
State taxes—net of federal benefit	2,222		(1,098	)	821
Research and development credit	(887	)	(948	)	(356	)
Foreign income taxed at different rates	(929	)	(1,066	)	(1,064	)
Other	(593	)	797		1,202
Change in valuation allowance	—		—		(44,209	)
Total provision for income taxes	29,581		15,096		(32,666	)

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

The tax effects of temporary differences that give rise to significant portions of the deferred tax assets as of each of the years ended are presented below ($ amount in 000's):



	December 31, 2011	December 31, 2010
Deferred tax assets:
Net operating loss carryforward	1,830	1,920
Deferred revenue	31,234	25,173
Nondeductible reserves and accruals	13,699	10,990
Depreciation and amortization	684	2,029
General business credit carryforward	396	1,243
Stock-based compensation	6,247	4,225
Other	12	21
Total deferred tax assets	54,102	45,601

Summary of Income Tax Contingencies [Table Text Block]

The aggregate changes in the balance of unrecognized tax benefits are as follows ($ amounts in 000's):



	Fiscal Year
	2011		2010	2009
Balance, beginning of year	12,083		3,387	1,952
Increases for tax positions related to the current year	9,049		8,696	440
Increases (decreases) for tax positions related to the prior year	(1,863	)	—	995
Balance, end of year	19,269		12,083	3,387

- Definition

Tabular disclosure of tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities (i.e., uncertain tax positions) and other types of income tax contingencies, including: (1) the policy on classification of interest and penalties; (2) a tabular reconciliation of the total amounts of unrecognized tax benefits at the beginning and end of the period; the total amount(s) of: (3) unrecognized tax benefits that, if recognized, would affect the effective tax rate, and (4) interest and penalties recognized in each of the income statement and balance sheet; (5) for positions for which it is reasonably possible that the total amounts unrecognized will significantly change within 12 months of the reporting date the: (i) nature of the uncertainty, (ii) nature of the event that could occur that would cause the change, and (iii) an estimate of the range of the reasonably possible change or a statement that an estimate of the range cannot be made; and (6) a description of tax years that remain subject to examination by major tax jurisdictions.

+ References + Details

Property and Equipment - Net (Tables)

12 Months Ended

Dec. 31, 2011

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

Property and equipment consisted of the following ($ amounts in 000's):



	December 31, 2011		December 31, 2010
Evaluation units	13,912		10,607
Computer equipment and software	12,219		9,561
Furniture and fixtures	1,307		1,087
Leasehold improvements and tooling	4,381		4,548
Total property and equipment	31,819		25,803
Less: accumulated depreciation	(23,853	)	(18,747	)
Property and equipment—net	7,966		7,056

Schedule II

12 Months Ended

Dec. 31, 2011

Valuation and Qualifying Accounts [Abstract]

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS

SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS



	Fiscal Year
	2011		2010		2009
	($ amounts in 000's)
Allowance for Doubtful Accounts:
Beginning balance	303		367		318
Charged to costs and expenses	159		8		161
Bad debt write-offs	(126	)	(72	)	(112	)
Ending balance	336		303		367

Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2011

Accounting Policies [Abstract]

Schedule of Product Warranty Liability [Table Text Block]

Accrued warranty activities are summarized as follows ($ amounts in 000's):



	Fiscal Year
	2011		2010		2009
Accrued warranty balance—beginning of the period	1,878		2,257		2,882
Warranty costs incurred	(1,778	)	(1,337	)	(1,502	)
Provision for warranty for the year	2,103		1,069		1,169
Accruals related to changes in estimates	379		(111	)	(292	)
Accrued warranty balance—end of the period	2,582		1,878		2,257

Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]

The notional amount of forward exchange contracts to hedge balance sheet accounts as of December 31, 2011 was (amounts in 000's):



	Buy/Sell	Notional
To hedge balance sheet accounts:
Currency
EUR	Buy	5,526
GBP	Buy	1,545
CAD	Buy	12,000

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 62,492	$ 41,245	$ 60,179
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	6,989	5,696	5,935
Write-off of intangible assets	0	0	2,387
Loss on disposal of fixed assets	22	14	0
Amortization of investment premiums, net of discounts	12,515	7,349	836
Stock-based compensation	19,015	9,315	7,461
Excess tax benefit from employee stock option plans	(19,829)	(5,781)	(1,574)
Income tax benefit from release of valuation allowance	0	0	(30,211)
Changes in operating assets and liabilities:
Accounts receivable—net	(23,246)	(17,784)	(8,508)
Inventory	(6,034)	(5,946)	(2,012)
Deferred tax assets	(7,874)	(4,278)	(9,578)
Prepaid expenses and other current assets	(4,565)	(3,849)	(190)
Deferred cost of revenues	3,817	364	(1,063)
Other assets	(1,940)	55	(419)
Accounts payable	6,801	2,437	3,046
Accrued liabilities	1,765	2,363	2,157
Accrued payroll and compensation	4,773	5,465	630
Deferred revenue	42,177	50,701	30,313
Income taxes payable	35,964	16,017	2,582
Net cash provided by operating activities	132,842	103,383	61,971
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of investments	(516,906)	(416,376)	(137,231)
Maturities and sales of investments	356,327	136,380	156,126
Purchases of property and equipment	(3,624)	(3,776)	(4,589)
Payment made in connection with business acquisition, net	(2,623)	0	(549)
Change in restricted cash	0	62	0
Net cash provided by (used in) investing activities	(166,826)	(283,710)	13,757
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from exercise of stock options and warrants	19,968	29,110	3,978
Proceeds from initial public offering	0	0	91,565
Offering costs paid in connection with initial public offering		(872)	(3,305)
Repurchase of convertible preferred shares	0	0	(12,768)
Repurchase of common shares	0	0	(2,995)
Excess tax benefit from employee stock option plans	19,829	5,781	1,574
Net cash provided by financing activities	39,797	34,019	78,049
EFFECT OF EXCHANGE RATES ON CASH AND CASH EQUIVALENTS	(682)	709	2,110
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	5,131	(145,599)	155,887
CASH AND CASH EQUIVALENTS—Beginning of year	66,859	212,458	56,571
CASH AND CASH EQUIVALENTS—End of year	71,990	66,859	212,458
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid (refunded) for income taxes	(305)	2,483	4,746
NON-CASH INVESTING AND FINANCING ACTIVITIES:
Purchase of property and equipment not yet paid	440	135	849
Accrued offering costs not yet paid	$ 0	$ 0	$ 872

Consolidated Balance Sheets Parenthetical - USD ($) shares in Thousands, $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Allowance for doubtful accounts	$ 336	$ 303
Common Stock, par value	$ 0.001	$ 0.001
Common Stock, shares authorized	300,000	300,000
Common Stock, shares issued	156,401	150,172
Common Stock, shares outstanding	154,992	148,763

Employee Benefit Plan	12 Months Ended
Employee Benefit Plan	Dec. 31, 2011
Employee Benefit Plan [Abstract]
EMPLOYEE BENEFIT PLAN	EMPLOYEE BENEFIT PLAN We have established a 401(k) tax-deferred savings plan (the “401(k) Plan”) which permits participants to make contributions by salary deduction pursuant to Section 401(k) of the Internal Revenue Code. Under the 401(k) Plan, participating employees may defer a portion of their pre-tax earnings, up to the IRS annual contribution limit ($16,500 for the calendar year 2011). In Canada, we have established a Group Registered Retirement Savings Plan program (the "RRSP Plan") which permits participants to make tax deductible contributions up to the maximum RRSP contribution limits under the Income Tax Act. As of January 1, 2011, our board of directors approved 50.0% matching contributions on employee contributions, up to 4.0% of the employee's eligible earnings. Our matching contributions to the RRSP and 401(k) Plans for fiscal 2011 was $1.5 million.

Commitments and Contingencies

12 Months Ended

Dec. 31, 2011

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES

Leases and Minimum Royalties—We lease our facilities under various noncancelable operating leases, which expire through the year 2015. Rent expense was $8.2 million, $7.0 million and $6.1 million for fiscal 2011, 2010 and 2009, respectively. Rent expense is recognized using the straight-line method over the term of the lease. The aggregate future noncancelable minimum rental payments on operating leases as of December 31, 2011 are as follows ($ amounts in 000's):



	Rental Payment
Fiscal Years:
2012	7,308
2013	4,712
2014	3,041
2015	1,604
Total	16,665

Contract Manufacturer Commitments—Our independent contract manufacturers procure components and build our products based on our forecasts. These forecasts are based on estimates of future demand for our products, which are in turn based on historical trends and an analysis from our sales and marketing organizations, adjusted for overall market conditions. In order to reduce manufacturing lead times and plan for adequate component supply, we may issue purchase orders to some of our independent contract manufacturers which may not be cancelable. As of December 31, 2011, we had $26.0 million of open purchase orders with our independent contract manufacturers that may not be cancelable.

Litigation—In August 2009, Trend Micro filed a complaint against us in the Superior Court of the State of California for Santa Clara County alleging breach of contract and seeking a declaratory judgment that we are obligated to make certain royalty payments to Trend Micro pursuant to a settlement and license agreement entered into in January 2006. In December 2011, we entered into a settlement agreement with Trend Micro resolving the dispute for a one-time payment of $9.0 million. The settlement agreement includes a fully paid license to the patents subject to the prior patent license agreement with no continuing obligation to pay royalties for those patents. We had previously accrued a liability of $7.2 million as of the date of the settlement of our litigation with Trend Micro. The remaining $1.8 million was recorded as a prepaid asset as of December 31, 2011, which is being expensed as Cost of revenue over the remaining term of the related patents of four years.

In August 2009, Enhanced Security Research, LLC and Security Research Holdings LLC (collectively “ESR”), a non-practicing entity, filed a complaint against us in the United States District Court for the District of Delaware alleging infringement by us and other defendants of two patents. The plaintiffs are claiming unspecified damages and requesting an injunction against the alleged infringement. In June 2010, the Court granted our motion to stay pending the outcome of reexamination proceedings on both asserted patents. The PTO has finally rejected all of the claims of the patents in the suit and ESR has appealed this result to the Board of Patent Appeals and Interferences (“BPAI”). We have determined that, as of this time, there is not a reasonable possibility that a loss may be incurred.

In April 2010, an individual, a former stockholder of Fortinet, filed a class action lawsuit against us claiming unspecified damages in the California Superior Court for the County of Los Angeles alleging violation of various California Corporations Code sections and related tort claims alleging misrepresentation and breach of fiduciary duty regarding the 2009 repurchase by Fortinet of shares of its stock while we were a privately-held company. The plaintiff is claiming unspecified damages. In September 2010, the Court granted our motion to transfer the case to the California Superior Court for Santa Clara County and the plaintiff has filed an amended complaint in the Superior Court to add individual defendants, among other amendments. Currently the case is in the early stages, and we have determined that, as of this time, there is not a reasonable possibility that a loss may be incurred.

In July 2010, Network Protection Sciences, LLC ("NPS"), a non-practicing entity, filed a complaint in the United States District Court for the Eastern District of Texas alleging patent infringement by us and other defendants. NPS is claiming unspecified damages, including treble damages for willful infringement, and requests an injunction against such alleged infringement. In December 2011, in the United States District Court for the Eastern District of Texas ordered the case to be transferred to the Northern District of California. Currently the case is in the early stages, and we have determined that, as of this time, there is not a reasonable possibility that a loss may be incurred.

Indemnification—Under the indemnification provisions of our standard sales contracts, we agree to defend our customers against third-party claims asserting infringement of certain intellectual property rights, which may include patents, copyrights, trademarks, or trade secrets, and to pay judgments entered on such claims. Our exposure under these indemnification provisions is generally limited to the total amount paid by our customer under the agreement. However, certain agreements include indemnification provisions that could potentially expose us to losses in excess of the amount received under the agreement. To date, there have been no claims under such indemnification provisions.

- Definition

The entire disclosure for commitments and contingencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 14
-Paragraph 3
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9, 10, 11, 12
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.25)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14435-108349

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 440
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25287-109308

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6449706&loc=d3e16207-108621

+ Details

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
CURRENT ASSETS:
Cash and cash equivalents	$ 71,990	$ 66,859
Short-term investments	318,283	246,651
Accounts receivable, net of allowance for doubtful accounts of $336 and $303 at December 31, 2011 and December 31, 2010, respectively	95,522	72,336
Inventory	16,249	13,517
Deferred tax asset	7,578	8,158
Prepaid expenses and other current assets	11,808	8,849
Deferred cost of revenues	2,140	3,788
Total current assets	523,570	420,158
PROPERTY AND EQUIPMENT—Net	7,966	7,056
DEFERRED TAX ASSET—Non-current	46,523	37,443
DEFERRED COST OF REVENUES	3,375	5,543
LONG-TERM INVESTMENTS	148,414	73,950
OTHER ASSETS	4,899	1,272
TOTAL ASSETS	734,747	545,422
CURRENT LIABILITIES:
Accounts payable	19,768	12,761
Accrued liabilities	15,971	16,303
Accrued payroll and compensation	24,197	19,670
Deferred revenue	206,928	169,648
Total current liabilities	266,864	218,382
DEFERRED REVENUE—Non-current	87,905	82,983
OTHER NON-CURRENT LIABILITIES	21,624	11,603
Total liabilities	376,393	312,968
COMMITMENTS AND CONTINGENCIES (Note 9)
STOCKHOLDERS' EQUITY:
Common stock, $0.001 par value — 300,000 shares authorized; 156,401 and 150,172 shares issued and 154,992 and 148,763 shares outstanding at December 31, 2011 and December 31, 2010, respectively	156	150
Additional paid-in-capital	317,026	251,845
Treasury stock	(2,995)	(2,995)
Accumulated other comprehensive income	402	2,181
Retained earnings (accumulated deficit)	43,765	(18,727)
Total stockholders' equity	358,354	232,454
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 734,747	$ 545,422

Deferred Revenues (Details) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Deferred Revenue Arrangement [Line Items]
Short-term	$ 206,928	$ 169,648
Long-term	87,905	82,983
Total deferred revenue	294,833	252,631
Product [Member]
Deferred Revenue Arrangement [Line Items]
Total deferred revenue	5,817	4,466
Services [Member]
Deferred Revenue Arrangement [Line Items]
Total deferred revenue	272,843	219,022
Ratable and other revneue [Member]
Deferred Revenue Arrangement [Line Items]
Total deferred revenue	$ 16,173	$ 29,143

- Definition

The noncurrent portion of deferred revenue amount as of balance sheet date. Deferred revenue is a liability related to a revenue producing activity for which revenue has not yet been recognized, and is not expected to be recognized in the next twelve months. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

+ References + Details

Income Taxes , Provision for Income Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Current:
Federal	$ 34,856	$ 10,633	$ 4,882
State	2,785	(82)	1,003
Foreign	1,402	9,298	1,173
Total current	39,043	19,849	7,058
Deferred:
Federal	(9,326)	(4,119)	(35,331)
State	(136)	(626)	(3,850)
Foreign	0	(8)	(543)
Total deferred	(9,462)	(4,753)	(39,724)
Total provision for income taxes	$ 29,581	$ 15,096	$ (32,666)

Acquisitions (Details) $ in Millions	12 Months Ended
Acquisitions (Details) $ in Millions	Dec. 31, 2011 yr	Apr. 06, 2011 USD ($)
Business Acquisition [Line Items]
Cash payment		$ 2.6
Price allocated to tangible assets		0.9
Price allocated to liabilities		0.1
Price allocated to indentifiable intangible assets		$ 1.8
Amortizable life of purchased indentifiable intangible assets (in years) \| yr	3

Intangible Assets

12 Months Ended

Dec. 31, 2011

Finite-Lived Intangible Assets [Abstract]

INTANGIBLE ASSETS

The following table presents the detail of our existing intangible assets with definite lives included in other assets as of December 31, 2011 ($ amounts in 000's):



	Gross	Accumulated Amortization	Net
Existing intangibles	1,772	394	1,378

Amortization expense, for the nine months post acquisition, was $0.4 million in fiscal 2011. The following table summarizes estimated future amortization expense of purchased intangible assets with definite lives for the future fiscal year ($ amounts in 000's):



	Amount
Fiscal Years:
2012	563
2013	611
2014	204
Total	1,378

Inventory

12 Months Ended

Dec. 31, 2011

Inventory Disclosure [Abstract]

INVENTORY

Inventory consisted of the following ($ amounts in 000's):



	December 31, 2011	December 31, 2010
Raw materials	3,447	2,593
Finished goods	12,802	10,924
Inventory	16,249	13,517

Segment Information

12 Months Ended

Dec. 31, 2011

Segment Reporting [Abstract]

SEGMENT INFORMATION

ASC 280, establishes standards for reporting information about operating segments. Operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker in deciding how to allocate resources and in assessing performance. Our chief operating decision maker is our chief executive officer. Our chief executive officer reviews financial information presented on a consolidated basis, accompanied by information about revenue by geographic region for purposes of allocating resources and evaluating financial performance. We have one business activity, and there are no segment managers who are held accountable for operations, operating results and plans for levels or components below the consolidated unit level. Accordingly, we are considered to be in a single reportable segment and operating unit structure.

Revenue by geographic region is based on the billing address of the customer. The following tables set forth revenue and property and equipment by geographic region ($ amounts in 000's):



	Fiscal Year
Revenue	2011	2010	2009
Americas:
United States	120,456	92,097	73,172
Other Americas	52,038	31,864	19,449
	172,494	123,961	92,621
EMEA	152,385	121,604	95,886
APAC	108,697	79,131	63,608
Total revenue	433,576	324,696	252,115


Property and Equipment	December 31, 2011	December 31, 2010
Americas:
United States	2,225	1,639
Canada	4,062	3,933
Other Americas	33	13
	6,320	5,585
EMEA	805	616
APAC	841	855
Total property and equipment—net	7,966	7,056

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 131
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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+ Details

Inventory (Details) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Inventory, Net [Abstract]
Raw materials	$ 3,447	$ 2,593
Finished goods	12,802	10,924
Inventory	$ 16,249	$ 13,517

Intangible Assets (Details) $ in Thousands	9 Months Ended	12 Months Ended
Intangible Assets (Details) $ in Thousands	Dec. 31, 2011 USD ($)	Dec. 31, 2011 USD ($)
Finite-Lived Intangible Assets, Net [Abstract]
Finite-Lived Intangible Assets, Gross	$ 1,772	$ 1,772
Finite-Lived Intangible Assets, Accumulated Amortization	394	394
Finite-Lived Intangible Assets, Net	1,378	1,378
Amortization expense	$ 400
Fiscal Years:
2012		563
2013		611
2014		204
Total		$ 1,378

Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2011

Accounting Policies [Abstract]

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Business—Fortinet, Inc. (“Fortinet”) was incorporated in Delaware in November 2000 and is a leading provider of network security appliances and UTM network security solutions to enterprises, service providers and governmental entities worldwide. Fortinet’s solutions are designed to integrate multiple levels of security protection, including firewall, virtual private networking, application control, antivirus, intrusion prevention, web filtering, antispam and WAN acceleration.

At December 31, 2011 and December 31, 2010, no single customer accounted for more than 10% of net accounts receivable.

During fiscal 2011 and 2010, no single customer accounted for more than 10% of total net revenues. During fiscal 2009, one customer accounted for 12% of total net revenues.

Deferred Revenue—Deferred revenue consists of amounts that have been invoiced but that have not yet been recognized as revenue.

Research and Development Costs—Research and development costs are expensed as incurred.

Revenue is recognized when all of the following criteria have been met:


•	Persuasive evidence of an arrangement exists. Binding contracts or purchase orders are generally used to determine the existence of an arrangement.


•	Delivery has occurred. Delivery occurs when we fulfill an order and title and risk of loss has been transferred or upon delivery of the service contract registration code.


•	The fee is fixed or determinable. We assess whether the fee is fixed or determinable based on the payment terms associated with the transaction. In the event payment terms differ from our standard business practices, the fees are deemed to be not fixed or determinable and revenue is recognized when the payments become due, provided the remaining criteria for revenue recognition have been met.


•	Collectability is probable. We assess collectability based primarily on creditworthiness as determined by credit checks and analysis, as well as payment history. Payment terms generally range from 30 to 90 days from invoice date.

Accrued warranty activities are summarized as follows ($ amounts in 000's):



	Fiscal Year
	2011		2010		2009
Accrued warranty balance—beginning of the period	1,878		2,257		2,882
Warranty costs incurred	(1,778	)	(1,337	)	(1,502	)
Provision for warranty for the year	2,103		1,069		1,169
Accruals related to changes in estimates	379		(111	)	(292	)
Accrued warranty balance—end of the period	2,582		1,878		2,257

The notional amount of forward exchange contracts to hedge balance sheet accounts as of December 31, 2011 was (amounts in 000's):



	Buy/Sell	Notional
To hedge balance sheet accounts:
Currency
EUR	Buy	5,526
GBP	Buy	1,545
CAD	Buy	12,000

Recent Accounting Pronouncements

In May 2011, the FASB issued ASU No. 2011-04, Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and International Financial Reporting Standards (Topic 820) – Fair Value Measurement (ASU 2011-04), to provide a consistent definition of fair value and ensure that the fair value measurement and disclosure requirements are similar between U.S. GAAP and International Financial Reporting Standards. ASU 2011-04 changes certain fair value measurement principles and enhances the disclosure requirements particularly for Level 3 fair value measurements. This accounting update will be applicable to the Company beginning in the first quarter of fiscal year 2012 and should be applied prospectively. The Company does not believe the adoption of this guidance will have a material impact on its consolidated financial statements.

In June 2011, the FASB issued ASU No. 2011-05, Comprehensive Income (Topic 220) - Presentation of Comprehensive Income (ASU 2011-05), to require an entity to present the total of comprehensive income, the components of net income, and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. ASU 2011-05 eliminates the option to present the components of other comprehensive income as part of the statement of equity. This accounting update will be applicable to the Company beginning in the first quarter of fiscal year 2012.

Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2011

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

The aggregate future noncancelable minimum rental payments on operating leases as of December 31, 2011 are as follows ($ amounts in 000's):



	Rental Payment
Fiscal Years:
2012	7,308
2013	4,712
2014	3,041
2015	1,604
Total	16,665

Certain Relationships and Related Party Transactions (Details)	1 Months Ended	12 Months Ended
	Feb. 29, 2008	Dec. 31, 2009 USD ($) employees
Immediate Family Member of Management or Principal Owner [Member]
Related Party Transaction [Line Items]
Compensation		$ 166,000
Number of Employees Involved in Related Party Transactions \| employees		2
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Operating Lease, Term	23 months
Operating Expenses		$ 917,000

Income Taxes , Deferred Tax Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Deferred Taxes [Line Items]
Income tax benefit from employee stock option plans	$ 26,205	$ 9,235	$ 1,574
Deferred Tax Asset Not Recognized, Amount of Unrecognized Deferred Tax Asset	5,500	1,100
Deferred tax assets:
Net operating loss carryforward	1,830	1,920
Deferred revenue	31,234	25,173
Nondeductible reserves and accruals	13,699	10,990
Depreciation and amortization	684	2,029
General business credit carryforward	396	1,243
Stock-based compensation	6,247	4,225
Other	12	21
Total deferred tax assets	54,102	$ 45,601
Undistributed Earnings of Foreign Subsidiaries	24,300
State and Local Jurisdiction [Member]
Deferred tax assets:
Operating Loss Carryforwards	37,300
Tax Credit Carryforward, Amount	$ 1,600

Certain Relationships and Related Party Transactions	12 Months Ended
Certain Relationships and Related Party Transactions	Dec. 31, 2011
Related Party Transactions [Abstract]
CERTAIN RELATIONSHIPS AND RELATED PARTY TRANSACTIONS	CERTAIN RELATIONSHIPS AND RELATED PARTY TRANSACTIONS During fiscal 2009, we paid compensation of $166,000 to two employees who are directly related to a former board member. This individual ceased being a board member as of October 2009. In February 2008, we entered into a 23-month non-cancelable facility lease agreement, determined to be an arm's length transaction, with an entity affiliated with one of our former board members. During fiscal 2009, we paid $917,000 for office rent and operating expenses. The lease expired on December 31, 2009.

- Definition

The entire disclosure for related party transactions, including the nature of the relationship(s), a description of the transactions, the amount of the transactions, the effects of any change in the method of establishing the terms of the transaction from the previous period, stated interest rate, expiration date, terms and manner of settlement per the agreement with the related party, and amounts due to or from related parties. If the entity and one or more other entities are under common ownership or management control and this control affects the operating results or financial position, disclosure includes the nature of the control relationship even if there are no transactions between the entities. Disclosure may also include the aggregate amount of current and deferred tax expense for each statement of earnings presented where the entity is a member of a group that files a consolidated tax return, the amount of any tax related balances due to or from affiliates as of the date of each statement of financial position presented, the principal provisions of the method by which the consolidated amount of current and deferred tax expense is allocated to the members of the group and the nature and effect of any changes in that method. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 4
-Section 08
-Paragraph k

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 3A
-Section 04
-Paragraph b

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 57
-Paragraph 1-4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(k))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39691-107864

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39678-107864

+ Details

Income Taxes , Effective Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Tax Disclosure [Abstract]
Tax at federal statutory tax rate	$ 32,225	$ 19,719	$ 9,629
Stock-based compensation expense	(2,457)	(2,308)	1,311
State taxes—net of federal benefit	2,222	(1,098)	821
Research and development credit	(887)	(948)	(356)
Foreign income taxed at different rates	(929)	(1,066)	(1,064)
Other	(593)	797	1,202
Change in valuation allowance	0	0	(44,209)
Total provision for income taxes	$ 29,581	$ 15,096	$ (32,666)

Summary of Significant Accounting Policies , Property and Equipment (Details) - yr	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life, Minimum (in years)	1	1
Property, Plant and Equipment, Useful Life, Maximum (in years)	3	3
Evaluation units [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life (in years)	1	1

Segment Information (Details) $ in Thousands	12 Months Ended
Segment Information (Details) $ in Thousands	Dec. 31, 2011 USD ($) Business_Activity Segment_Managers reportable_segment	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)
Segment Reporting Information [Line Items]
Business activity (in business activities) \| Business_Activity	1
Segment managers responsible for operations (in segment managers) \| Segment_Managers	0
Number of Reportable Segments (in reportable segments) \| reportable_segment	1
Revenue	$ 433,576	$ 324,696	$ 252,115
Property and equipment - net	7,966	7,056
Americas [Member]
Segment Reporting Information [Line Items]
Revenue	172,494	123,961	92,621
Property and equipment - net	6,320	5,585
United States
Segment Reporting Information [Line Items]
Revenue	120,456	92,097	73,172
Property and equipment - net	2,225	1,639
Canada [Member]
Segment Reporting Information [Line Items]
Property and equipment - net	4,062	3,933
Other Americas [Member]
Segment Reporting Information [Line Items]
Revenue	52,038	31,864	19,449
Property and equipment - net	33	13
EMEA [Member]
Segment Reporting Information [Line Items]
Revenue	152,385	121,604	95,886
Property and equipment - net	805	616
APAC [Member]
Segment Reporting Information [Line Items]
Revenue	108,697	79,131	$ 63,608
Property and equipment - net	$ 841	$ 855

Summary of Significant Accounting Policies , Concentration of Credit Risk (Details) - Customer Concentration Risk [Member] - customers	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration Risk, Benchmark	10.00%	10.00%
Number Of Customers Accounting For Ten Percent Or More Of Concentration Risk	0	0
Sales Revenue [Member]
Concentration Risk [Line Items]
Concentration Risk, Benchmark	10.00%	10.00%	10.00%
Number Of Customers Accounting For Ten Percent Or More Of Concentration Risk	0	0	1
Percentage of revenue from a single customer			12.00%

Stock Plans (Details) $ / shares in Units, $ in Thousands		12 Months Ended
Stock Plans (Details) $ / shares in Units, $ in Thousands	Nov. 17, 2009 shares	Dec. 31, 2011 USD ($) yr $ / shares shares	Dec. 31, 2010 USD ($) yr $ / shares shares	Dec. 31, 2009 USD ($) yr $ / shares shares	Dec. 31, 2000 shares	Jan. 02, 2011 shares	Dec. 28, 2008 $ / shares shares	Jan. 28, 2008 shares
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Allocated Share-based Compensation Expense \| $		$ 19,015	$ 9,315	$ 7,461
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected term in years, minimum \| yr		4.1		4.5
Expected term in years \| yr			4.6
Expected term in years, maximum \| yr		4.6		4.6
Volatility, minimum		40.00%	38.00%	43.00%
Volatility, maximum		57.00%	43.00%	52.00%
Risk-free interest rate, minimum		0.60%	1.10%	1.30%
Risk-free interest rate, maximum		2.00%	2.40%	2.30%
Dividend rate		0.00%	0.00%	0.00%
Estimated fair value \| $ / shares		$ 8.10	$ 3.59	$ 1.43
Share-based Compensation Arrangement by Share-based Payment Award, Shares Availble for Grant [Roll Forward]
Beginning balance, Shares available for grant		15,090,000	18,097,000	10,095,000
Additional shares authorized (in shares)		7,438,000		13,774,000
Granted (in shares)		(6,526,000)	(4,832,000)	(8,406,000)
Forfeited (in shares)		1,397,000	1,825,000	2,634,000
Ending balance, Shares available for grant		17,399,000	15,090,000	18,097,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Balance - Beginning (in shares)		22,489,000	34,410,000	31,466,000
Granted (in shares)		(6,526,000)	(4,832,000)	(8,406,000)
Forfeited (in shares)		1,397,000	1,825,000	2,634,000
Exercised (in shares)		(6,229,000)	(14,928,000)	(2,828,000)
Vested (in shares)				20,504,000			18,250,000
Balance - Ending (in shares)		21,389,000	22,489,000	34,410,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Balance - Beginning (in dollars per share) \| $ / shares		$ 4.21	$ 2.53	$ 2.06
Granted (in dollars per share) \| $ / shares		21.05	9.70	4.00
Forfeited (in dollars per share) \| $ / shares		11.79	5.56	3.36
Exercised (in dollars per share) \| $ / shares		3.21	1.95	0.96
Vested (in dollars per share) \| $ / shares				1.66			$ 1.13
Balance - Ending (in dollars per share) \| $ / shares		9.14	4.21	2.53
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Estimated fair value \| $ / shares		$ 8.10	$ 3.59	$ 1.43
Exercised, aggregate intrinsic value \| $		$ 113,950	$ 117,934	$ 10,490
Options vested and expected to vest, Outstanding (in shares)		20,394,000
Options vested and expected to vest, Weighted average exercise price (in dollars per share) \| $ / shares		$ 8.90
Options vested and expected to vest, Weighted average remaining contractual life (in years) \| yr		4.77
Options vested and expected to vest, Aggregate intrinsic value \| $		$ 265,552
Options exercisable, Outstanding (in shares)		10,953,000
Options exercisable, Weighted average exercise price (in dollars per share) \| $ / shares		$ 3.57
Options exercisable, Weighted average remaining contractual life (in years) \| yr		4.16
Options exercisable, Aggregate intrinsic value \| $		$ 199,766
Compensation cost not yet recognized \| $		$ 53,000
Compensation cost not yet recognized period of recognition (in years) \| yr		3.0
Total fair value of awards vested \| $		$ 11,800	8,500	5,500
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized		8,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate		15.00%
Purchase Price of Common Stock As Percentage Of Lower Of Fair Market Value Of Common Stock On First Day Of Offering Period Or Last Day Of Purchase Period		85.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected term in years \| yr		0.5
Volatility		59.90%
Risk-free interest rate		0.07%
Dividend rate		0.00%
Estimated fair value \| $ / shares		$ 6.56
Share-based Compensation Arrangement by Share-based Payment Award, Shares Availble for Grant [Roll Forward]
Ending balance, Shares available for grant		8,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Estimated fair value \| $ / shares		$ 6.56
Compensation expense recognized in connection with the ESPP \| $		$ 1,600
Research and development [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Allocated Share-based Compensation Expense \| $		4,691	2,339	1,963
Selling and marketing [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Allocated Share-based Compensation Expense \| $		9,325	3,810	3,020
General and administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Allocated Share-based Compensation Expense \| $		3,026	2,136	1,718
Product [Member] \| Cost of revenue [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Allocated Share-based Compensation Expense \| $		183	101	102
Services [Member] \| Cost of revenue [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Allocated Share-based Compensation Expense \| $		$ 1,790	$ 929	$ 658
Stock Plan, 2000 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized					21,500,000
Stock Plan, 2000 [Member] \| Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period					4 years
Stock Plan, 2000 [Member] \| Stock Options, Nonqualifying [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Percent of Market Price, Purchase or Offering Date					85.00%
Stock Plan, 2008 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized								5,000,000
Stock Plan, 2009 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	21,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Before Adjustments	9,000,000
Individual Owning 10 Percent or More of Stock [Member] \| Stock Plan, 2000 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Percent of Market Price, Purchase or Offering Date					110.00%
Share-based Compensation Arrangement by Share-based Payment Award, Minimum Stock Ownership Percent Triggering Early Award Expiration					10.00%
Individual Owning 10 Percent or More of Stock [Member] \| Stock Plan, 2000 [Member] \| Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Expiration Period					5 years
Individual Owning 10 Percent or More of Stock [Member] \| Stock Plan, 2008 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Percent of Market Price, Purchase or Offering Date								110.00%
Share-based Compensation Arrangement by Share-based Payment Award, Minimum Stock Ownership Percent Triggering Early Award Expiration								10.00%
Individual Owning 10 Percent or More of Stock [Member] \| Stock Plan, 2008 [Member] \| Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Expiration Period								5 years
Individual Owning 10 Percent or More of Stock [Member] \| Stock Plan, 2009 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Percent of Market Price, Purchase or Offering Date	110.00%
Share-based Compensation Arrangement by Share-based Payment Award, Minimum Stock Ownership Percent Triggering Early Award Expiration	10.00%
Individual Owning 10 Percent or More of Stock [Member] \| Stock Plan, 2009 [Member] \| Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Expiration Period	5 years
Employee [Member] \| Stock Plan, 2000 [Member] \| Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Expiration Period					10 years
Employee [Member] \| Stock Plan, 2008 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Percent of Market Price, Purchase or Offering Date								100.00%
Employee [Member] \| Stock Plan, 2009 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Percent of Market Price, Purchase or Offering Date	100.00%
Directors and Other Service Providers [Member] \| Stock Plan, 2008 [Member] \| Stock Options, Nonqualifying [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Percent of Market Price, Purchase or Offering Date								100.00%
Directors and Other Service Providers [Member] \| Stock Plan, 2009 [Member] \| Stock Options, Nonqualifying [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Percent of Market Price, Purchase or Offering Date	100.00%
Individual Owning 10 Percent or Less of Stock [Member] \| Stock Plan, 2009 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Stock Ownership Percent Triggering Early Award Expiration	10.00%
Individual Owning 10 Percent or Less of Stock [Member] \| Stock Plan, 2009 [Member] \| Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Expiration Period	7 years
Share-based Compensation Award Authorized Number Changes, Lesser of Fixed Amount of Shares [Member] \| Stock Plan, 2009 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Increase to Number of Shares Authorized, Maximum						7,000,000
Share-based Compensation Award Authorized Number Changes, Lesser of Outstanding Shares on Last Day of Preceeding Year [Member] \| Stock Plan, 2009 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Increase to Number of Shares Authorized, Maximum, Percent						5.00%

Segment Information (Tables)

12 Months Ended

Dec. 31, 2011

Segment Reporting [Abstract]

Revenue and property and equipment by geographic region [Table Text Block]

The following tables set forth revenue and property and equipment by geographic region ($ amounts in 000's):



	Fiscal Year
Revenue	2011	2010	2009
Americas:
United States	120,456	92,097	73,172
Other Americas	52,038	31,864	19,449
	172,494	123,961	92,621
EMEA	152,385	121,604	95,886
APAC	108,697	79,131	63,608
Total revenue	433,576	324,696	252,115


Property and Equipment	December 31, 2011	December 31, 2010
Americas:
United States	2,225	1,639
Canada	4,062	3,933
Other Americas	33	13
	6,320	5,585
EMEA	805	616
APAC	841	855
Total property and equipment—net	7,966	7,056

Property and Equipment - Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Property, Plant and Equipment, Net, by Type [Abstract]
Total property and equipment	$ 31,819	$ 25,803
Less: accumulated depreciation	(23,853)	(18,747)
Property and equipment - net	7,966	7,056
Depreciation expense	7,000	5,700	$ 5,000
Evaluation units [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Total property and equipment	13,912	10,607
Computer equipment and software [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Total property and equipment	12,219	9,561
Furniture and fixtures [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Total property and equipment	1,307	1,087
Leasehold improvements and tooling [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Total property and equipment	$ 4,381	$ 4,548

- Definition

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

+ References + Details