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Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2022

Stockholders' Equity Note [Abstract]

Stock-based Compensation Expense

The stock-based compensation related to our stock-based awards and employee stock purchase plan for the three and six months ended June 30, 2022 and 2021 is as follows (in thousands):

						Three Months Ended June 30,												Six Months Ended June 30,
						2022						2021						2022						2021
Cost of net revenues						$	1,614					$	1,418					$	3,128					$	2,724
Selling, general and administrative						26,491						23,058						51,216						44,902
Research and development						6,035						4,379						11,417						8,470
Total stock-based compensation						$	34,140					$	28,855					$	65,761					$	56,096

Summary Of Restricted Stock Units

A summary for the six months ended June 30, 2022 is as follows:

			Number of Shares Underlying RSUs (in thousands)						Weighted Average Grant Date Fair Value						Weighted Average Remaining Contractual Term (in years)						Aggregate Intrinsic Value (in thousands)
Unvested as of December 31, 2021			492						$	369.17
Granted			232						485.01
Vested and released			(189)						333.28
Forfeited			(22)						429.13
Unvested as of June 30, 2022			513						$	432.28					1.6						$	121,475

Summary Of Market-performance Based Restricted Stock Units

The following table summarizes the MSU performance for the six months ended June 30, 2022: 

			Number of Shares Underlying MSUs (in thousands)						Weighted Average Grant Date Fair Value						Weighted Average Remaining Contractual Term (in years)						Aggregate Intrinsic Value (in thousands)
Unvested as of December 31, 2021			174						$	551.57
Granted 1			101						607.96
Vested and released			(128)						396.10
Forfeited			(3)						744.39
Unvested as of June 30, 2022			144						$	725.73					1.5						$	34,097

Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions

The fair value of the option component of the 2010 Purchase Plan shares was estimated at the grant date using the Black-Scholes option pricing model with the following weighted average assumptions:

						Six Months Ended June 30,
						2022						2021
Expected term (in years)						1.5						1.0
Expected volatility						48.6		%				58.8		%
Risk-free interest rate						1.0		%				0.1		%
Expected dividends						—						—
Weighted average fair value at grant date						$	196.97					$	202.74

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- Definition

Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

+ References

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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