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Stock-based Compensation (Tables)
 9 Months Ended
Sep. 30, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Stock Option Activity
A summary of the Company’s stock option activity for the nine months ended September 30, 2021 was as follows:
Number of
Common
Stock Options		Weighted-
Average
Exercise
Price		Weighted-
Average
Remaining
Contractual
Life (Years)		Aggregate
Intrinsic Value
(In Thousands)
Outstanding as of December 31, 202016,188,071 $1.67 
Exercised(2,822,956)1.68 
Cancelled/Forfeited(665,011)1.67 
Outstanding as of September 30, 202112,700,104 1.71 8.33$176,413 
Schedule of Restricted Stock Awards Activity
Restricted stock awards activity for the nine months ended September 30, 2021 was as follows:
SharesWeighted Average
Grant Date Fair Value
per Share
Outstanding as of December 31, 20201,815,891 $1.15 
Forfeited(99,780)1.12 
Vested(831,819)0.93 
Outstanding as of September 30, 2021884,292 1.19 
Schedule of Restricted Stock Units Activity
A summary of the Company’s restricted stock units activity for the nine months ended September 30, 2021 was as follows:
SharesWeighted Average
Grant Date Fair
Value per Share
Outstanding as of December 31, 2020— $— 
Granted11,465,582 20.13 
Forfeited(188,251)23.00 
Vested(1,195,447)19.20 
Outstanding as of September 30, 202110,081,884 20.18 
Schedule of Stock-based Compensation Expense by Function
Stock-based compensation expense by function was as follows (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2021202020212020
Cost of sales$1,619 $83 $2,829 $237 
Research and development6,318 541 12,743 1,608 
Sales and marketing1,859 150 2,979 334 
General and administrative23,724 523 31,336 2,531 
Total$33,520 $1,297 $49,887 $4,710