Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 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 months ended March 31, 2022 and 2021 is as follows (in thousands):

	Three Months Ended March 31,
	2022		2021
Cost of net revenues	$	1,514	$	1,306
Selling, general and administrative	24,725		21,844
Research and development	5,382		4,091
Total stock-based compensation	$	31,621	$	27,241

Summary Of Restricted Stock Units

A summary for the three months ended March 31, 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	217	499.14
Vested and released	(176)	330.33
Forfeited	(11)	423.61
Unvested as of March 31, 2022	522	$	435.22	1.8	$	227,614

Summary Of Market-performance Based Restricted Stock Units

The following table summarizes the MSU performance for the three months ended March 31, 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 March 31, 2022	144	$	725.73	1.7	$	62,814

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:

	Three Months Ended March 31,
	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