Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2022

Share-Based Payment Arrangement [Abstract]

Stock-Based Compensation Expense for Employees and Non-Employees

Total share-based compensation expense recorded for employees and non-employees, is as follows (in thousands):

	Years Ended December 31,
	2022		2021		2020
Cost of revenues	$	2,484	$	1,621	$	950
Research and development	41,335		37,131		31,588
Sales and marketing	13,857		13,887		9,606
General and administrative	75,780		56,207		41,911
Total share-based compensation expense	$	133,456	$	108,846	$	84,055

Schedule of Assumptions Used to Determine Fair Value of ESPP

The following table summarizes the key assumptions used to determine the fair value of the awards:

Expected term (years)	3.00
Expected volatility	49.04	%
Expected dividends	—	%
Risk-free interest rate	0.27	%

The following table summarizes the key assumptions used to determine the fair value of rights granted under the 2013 ESPP:

	Years Ended December 31,
	2022			2021			2020
Expected term (years)	0.50			0.50			0.50
Expected volatility	70.37%-78.74%			47.02%-99.96%			52.06%-68.09%
Dividend yield	—		%	—		%	—		%
Risk-free interest rate	1.54%-4.54%			0.04%-0.07%			0.12%-0.15%
Weighted-average grant-date fair value per share	$	8.71		$	14.70		$	20.52

Schedule of Restricted Stock Unit Activity

RSUs and PSUs Activity

	RSUs and PSUs Outstanding
	Number of RSUs and PSUs Outstanding	Weighted Average Grant Date Fair Value
Balance at December 31, 2021	8,171,462	$	46.36
Granted	5,551,727	27.68
Released	(2,784,268)	48.10
Forfeited	(1,783,241)	38.63
Balance at December 31, 2022	9,155,680	$	36.03

Schedule of Stock Option Activity

Stock Option Activity

	Options Outstanding
	Number of Options Outstanding	Weighted-Average Exercise Price per Share		Weighted-Average Remaining Contractual Term in Years	Aggregate Intrinsic Value
Balance at December 31, 2021	381,756	$	7.28	2.80	$	8,942,541
Exercised	(55,498)	8.78
Balance at December 31, 2022	326,258	$	7.02	2.15	$	5,954,714