STOCK-BASED AWARDS (Tables)

6 Months Ended

Jun. 30, 2022

Share-Based Payment Arrangement [Abstract]

Schedule of Share-based Payment Arrangement, Option, Activity

A summary of stock option activity for the six months ended June 30, 2022 was as follows:

	Outstanding Options
	Number of Options	Weighted Average Exercise Price		Weighted-Average Remaining Contractual Term	Intrinsic Value (in thousands)
Balance—December 31, 2021	64,119,902	$	1.08	6.6	$	2,370,666
Options granted	—	—
Options exercised	(16,195,326)	0.79
Options canceled	(1,655,679)	1.85
Balance—June 30, 2022	46,268,897	$	1.15	6.84	$	742,613
Options vested and exercisable June 30, 2022	31,731,833	$	0.93	6.26	$	515,722

Schedule of Nonvested Restricted Stock Units Activity

A summary of RSU award activity was as follows:

	Restricted Stock Units
	Time-Based Shares	Performance-Based Shares	Total Shares	Weighted-Average Grant-Date Fair Value
Balance as of December 31, 2021	32,210,200	16,024,411	48,234,611	$	20.45
Granted	11,441,063	—	11,441,063	19.98
Vested	(2,616,301)	(13,934,271)	(16,550,572)	17.56
Cancelled/Forfeited	(1,150,078)	—	(1,150,078)	24.06
Balance as of June 30, 2022	39,884,884	2,090,140	41,975,024	$	21.36

Schedule of Share-based Compensation Arrangements by Share-based Payment Award

The performance condition was satisfied upon the closing of the Merger. The fair value of these performance-based RSUs was measured on the grant date, March 27, 2021, using a Monte Carlo simulation model, with the following assumptions:

Weighted average volatility	60.0	%
Expected term (in years)	5.0
Risk-free interest rate	0.9	%
Expected dividends	—

Schedule of Share-based Payment Arrangement, Expensed and Capitalized, Amount

Total employee and nonemployee stock-based compensation expense for the three and six months ended June 30, 2022 and 2021, was classified in the condensed consolidated statements of operations as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
Cost of revenue	$	10,381	$	—	$	18,980	$	—
Research and development	39,220		13,539		88,976		26,703
Selling, general and administrative	44,791		10,910		160,987		102,541
Total	$	94,392	$	24,449	$	268,943	$	129,244