Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2021

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Schedule of Total Stock-Based Compensation Expense

Total stock-based compensation expense for employees recognized in the consolidated statements of operations and comprehensive income (loss) was as follows:

	Year Ended December 31,
	2021		2020		2019
	(in thousands)
Equity based awards
Cost of revenue	$	1,654	$	613	$	36
Research and development		11,087		4,682		346
Selling, general and administrative		14,422		9,521		997
	$	27,163	$	14,816	$	1,379
Liability based awards - to be settled in equity
Cost of revenue	$	114	$	—	$	—
Research and development		492		445		-
Selling, general and administrative		2,223		748		-
		2,829		1,193		-
Total stock-based compensation - equity and liability based	$	29,992	$	16,009	$	1,379
Liability based awards - cash settled
Cost of revenue	$	102	$	264	$	—
Research and development		143		415		-
Selling, general and administrative		108		278		-
	$	353	$	957	$	—
Total stock-based compensation expense	$	30,345	$	16,966	$	1,379
Stock-based compensation expense recorded to additional paid-in capital
Equity based awards	$	27,163	$	14,816	$	1,379
Liability based awards - settled in equity		2,531		-		-
Total stock-based compensation expense recorded to additional paid-in capital	$	29,694	$	14,816	$	1,379

RSU, CRSU and PRSU

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Schedule of Activity of RSUs, Cash Restricted Stock Unit Award (CRSU) and Performance Based Restricted Stock Unit Awards (PRSU) Granted

Activity of RSUs, cash restricted stock unit award (“CRSU”) and performance based restricted stock unit awards ("PRSU") granted under the 2019 Plan is set forth below:

	RSU			Grant Date		CRSU			Grant Date		PRSU		Grant Date
	Number of			Fair Value		Number of			Fair Value		Number of		Fair Value
	Shares			per share		Shares			per share		Shares		per share
Balance at December 31, 2018		—			—		—			—		—		—
Granted		3,012,399			13.00		—			—		—		—
Vested		(23,077	)		13.00		—			—		—		—
Forfeited		-			—		—			—		—		—
Balance at December 31, 2019		2,989,322			13.00		—			—		—		—
Granted		682,517			53.42		11,844			48.62		—		-
Vested		(766,934	)		15.46		(11,220	)		49.37		—		-
Forfeited		(169,199	)		13.72		—			—		—		—
Balance at December 31, 2020		2,735,706			22.35		624			35.05		—		-
Granted		438,474			128.55		3,025			111.93		58,954		261.39
Vested		(874,462	)		27.94		(3,649	)		98.78		—		-
Forfeited		(72,521	)		33.34		—			—		—		—
Balance at December 31, 2021		2,227,197			40.56		—			-		58,954		261.39