Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2022

Schedule of components and classification of stock-based compensation expense

The components and classification of stock-based compensation expense were as follows (in thousands):

	Three months ended				Six months ended
	June 30, 2022		June 30, 2021		June 30, 2022		June 30, 2021
Cost of sales	$	1,268	$	279	$	3,144	$	550
Research and development		857		1,394		2,579		2,752
Selling, general and administrative		40,428		9,447		77,776		16,301
	$	42,553	$	11,120	$	83,499	$	19,603

Nonvested Restricted Stock Shares Activity

A summary of restricted stock activity for the six months ended June 30, 2022 is as follows (in thousands except share amounts):

		Weighted		Aggregate
		Average Grant Date		Intrinsic
	Shares	Fair Value		Value
Unvested restricted stock at December 31, 2021	4,851,873	$	21.59	$	—
Granted	1,126,491		24.30		—
Vested	(265,500)		33.37		—
Forfeited	(96,584)		25.83		—
Unvested restricted stock at June 30, 2022	5,616,280	$	18.84	$	92,049

Service Options Awards

Schedule of Share-based Compensation, Stock Options, Activity

				Weighted
		Weighted		Average
		Average		Remaining	Aggregate
		Exercise		Contractual	Intrinsic
	Shares	Price		Terms	Value
Options outstanding at December 31, 2021	9,786,909	$	11.65	7.70	$	172,412
Granted	759,851		24.42	—		—
Exercised	(276,141)		2.76	—		—
Forfeited	(106,000)		24.68	—		—
Options outstanding at June 30, 2022	10,164,619	$	12.67	7.39	$	75,300
Options exercisable at June 30, 2022	4,752,711		6.22	6.16		55,015
Options unvested at June 30, 2022	5,411,908	$	18.40	8.48	$	20,285