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Stock-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2021
Share-based Payment Arrangement [Abstract]  
Share-based Payment Arrangement, Expensed and Capitalized, Amount Stock-based compensation expense consisted of the following for the three and nine months ended September 30, 2021 and 2020:
Three Months Ended September 30,Nine Months Ended September 30,
2021202020212020
Cost of goods sold$780 $— $780 $1 
Selling, general, and administrative expenses63,552 42,377 75,222 43,748 
Total stock-based compensation expense$64,332 $42,377 $76,002 $43,749 
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions The following assumptions were used for options granted during the three and nine months ended September 30, 2021:
Three Months Ended September 30, 2021Nine Months Ended September 30, 2021
Risk-free interest rates
0.1 %
0.1% - 0.6%
Expected dividend yield
— — 
Expected term
0.25 years
0.25 - 6.25 years
Volatility
60 %60 %
Share-based Payment Arrangement, Option, Activity A summary of stock option activity for the nine months ended September 30, 2021 is as follows:
Number of
Stock
Options		Weighted
Average
Exercise
Price		Weighted
average
contractual
term		Aggregate
intrinsic
value
Balance at December 31, 20207,795,040 $4.88 4.9$103,821 
Options granted1,226,277 20.20 — — 
Options exercised(3,302,973)7.47 — 101,332 
Options forfeited(5,214)5.08 — — 
Balance at September 30, 20215,713,130 $6.67 4.7$254,712 
Exercisable as of September 30, 20215,713,130 6.67 4.7254,712 
Vested as of September 30, 20214,292,086 3.68 3.4—
Unvested as of September 30, 20211,421,044 15.70 — —
Share-based Payment Arrangement, Restricted Stock Unit, Activity A summary of RSU activity for the nine months ended September 30, 2021 is as follows:
Number of Restricted Stock UnitsWeighted Average Grant Date Fair Value
Unvested as of December 31, 20201,493,122 $13.14 
Granted3,089,92333.67 
Forfeited(102,964)15.05 
Released(1,064,858)15.51 
Vested and not yet released(60,232)35.26 
Unvested as of September 30, 20213,354,991 $30.84 
Schedule of Nonvested Performance-based Units Activity
TrancheNumber of PSUsStock Price Hurdle
1549,712 $47.75 
2549,710 $55.71 
3549,712 $63.67 
4549,710 $71.63 
5549,712 $79.59 
6549,710 $87.55 
7549,712 $95.50 
8549,710 $103.46