Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2023

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of stock option activity

	Outstanding Options and RSUs
					Weighted-
			Weighted-		Average
	Shares	Number of	Average		Remaining	Aggregate
	Available for	Shares	Exercise		Contractual	Intrinsic
(in thousands, except for contractual life and exercise price)	Grant	Outstanding	Price		Life	Value
					(in years)
Balance at December 31, 2022	3,263	5,300	$	21.11	4.84	$	131,385
Additional shares authorized	3,500	—
Options granted	(344)	344	$	44.53
Options exercised	—	(217)	$	13.59
RSUs granted	(5,466)	—
RSUs forfeited/cancelled	620	—
Balance at June 30, 2023	1,573	5,427	$	22.89	4.71	$	165,062
Exercisable at June 30, 2023		4,554	$	13.65	3.97	$	162,998
Vested and expected to vest at June 30, 2023		5,370	$	22.40	4.67	$	164,931

Restricted stock units

		Weighted-
		Average
		Grant Date
(in thousands, except for grant date fair value)	Shares	Fair Value
Balance at December 31, 2022	6,836	$	57.12
Granted	5,466	$	44.83
Vested	(2,024)	$	56.75
Cancelled/forfeited	(620)	$	49.63
Balance at June 30, 2023	9,658	$	50.68

Summary of stock-based compensation expenses

The following tables present the effect of employee and non-employee stock-based compensation expense on selected statements of operations line items for the three and six months ended June 30, 2023 and 2022.

	Three months ended June 30,
	2023						2022
	Employee		Non-Employee		Total		Employee		Non-Employee		Total
	(in thousands)
Cost of revenues	$	2,831	$	7	$	2,838	$	2,063	$	—	$	2,063
Research and development		14,723		772		15,495		11,938		520		12,458
Selling, general and administrative		25,630		507		26,137		26,296		156		26,452
Total	$	43,184	$	1,286	$	44,470	$	40,297	$	676	$	40,973

	Six months ended June 30,
	2023						2022
	Employee		Non-Employee		Total		Employee		Non-Employee		Total
	(in thousands)
Cost of revenues	$	5,385	$	9	$	5,394	$	3,779	$	—	$	3,779
Research and development		29,038		1,315		30,353		20,944		935		21,879
Selling, general and administrative		48,589		829		49,418		50,171		231		50,402
Total	$	83,012	$	2,153	$	85,165	$	74,894	$	1,166	$	76,060

Employee Stock Option [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of assumptions used in valuation of fair value

	Three months ended June 30,										Six months ended June 30,
	2023					2022					2023					2022
Expected term (years)	5.97		—	6.03					10.00		5.20		—	6.03		5.12		—	10.00
Expected volatility	68.35	%	—	68.75	%	56.15	%	—	56.38	%	68.35	%	—	70.07	%	55.91	%	—	62.30	%
Expected dividend rate				0.00	%				0.00	%				0.00	%				0.00	%
Risk-free interest rate	3.50	%	—	4.06	%	2.72	%	—	2.74	%	3.41	%	—	4.06	%	1.62	%	—	2.74	%