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Equity-Based Compensation (Tables)
12 Months Ended
Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]  
Summary of Option-Pricing Formula We account for forfeitures as they occur and apply the following assumptions in our Black-Scholes-Merton Model option-pricing formula:
Year Ended
December 31,
2022
Year Ended
December 31,
2021
Year Ended
December 31,
2020
Expected term (in years)
3.74 - 10.0
3.75 - 10.0
4.0 - 10.0
Risk-free interest rate
1.71% - 4.02%
0.34% - 1.34%
0.16% - 1.41%
Expected volatility
58.63% - 78.52%
58% - 78.94%
56% - 76%
Expected dividend yield0%0%0%
Summary of Option Activity
A summary of option activity under our stock option plans as of December 31, 2022, and the change during the year is presented below: 
OptionsNumber of
options
Weighted
average
exercise
price
Weighted
average
remaining
contractual
term (years)
Aggregate
intrinsic value
(in thousands)
Outstanding at December 31, 202146,805,766 $6.13 6.54$39,626 
Granted4,125,176 $2.99 
Exercised(211,187)$2.34 
Forfeited(2,501,698)$4.01 
Expired(2,130,416)$7.80 
Outstanding at December 31, 202246,087,641 $5.90 5.32$— 
Vested and expected to vest at December 31, 202246,087,641 $5.90 5.32$— 
Exercisable at December 31, 202233,747,590 $6.78 4.22$— 
Summary of Restricted Stock Unit Activity
A summary of restricted stock unit activity as of December 31, 2022, and the change during the year is presented below: 
Restricted stock unitsNumber of
shares
Weighted
average
fair value
Weighted
average
remaining
contractual
term (years)
Aggregate
intrinsic value
(in thousands)
Unvested at December 31, 2021661,376 $3.78 0.00$3,181 
Granted3,386,579 $3.11 
Actual vested(1,599,212)$3.44 
Unvested and expected to vest at December 31, 20222,448,743 $3.07 9.39$3,061