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Stock-based Compensation (Tables)
 12 Months Ended
Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]  
Schedule of Share-Based Payment Arrangement, Performance Shares, Outstanding Activity
The following table presents the number of PSUs that are eligible to vest based on the achievement of the respective stock price targets for each of Mr. Foroughi, Mr. Shikin and the Additional Participants (in aggregate):
PSUs Eligible to Vest
Company Stock Price TargetAdam ForoughiVasily ShikinAdditional Participants
(in aggregate)
$36.00 1,380,400 1,380,400 690,200 
$46.75 1,380,400 1,380,400 690,200 
$57.50 1,380,400 1,380,400 690,200 
$68.25 1,380,400 1,380,400 690,200 
$79.00 1,380,400 1,380,400 690,200 
6,902,000 6,902,000 3,451,000 
A summary of the PSU activities is as follows (in thousands, except share and per share data):
Number of Performance Stock UnitsWeighted
Average
Grant Date
Fair Value		Aggregate Intrinsic Value
Balances at December 31, 2022— $— $— 
Granted17,255,000 7.20 
Vested(3,451,000)7.20 
Balances at December 31, 202313,804,000 $7.20 $550,089 
Schedule of Weighted Average Assumptions Used, PSUs
The following assumptions were used to estimate the fair value of PSUs:
Year Ended December 31,
2023
Stock price on the date of grant
$12.41 - $16.43
Expected volatility
73.76% - 73.95%
Risk-free interest rate
3.58% - 3.60%
Discount for lack of marketability
20.43% - 20.65%
Dividend yield
0%
Schedule of Outstanding Restricted Stock Awards Activity
A summary of the RSU activities is as follows (in thousands, except share and per share data):
Number of Restricted Stock UnitsWeighted
Average
Grant Date
Fair Value		Aggregate Intrinsic Value
Balances at December 31, 202215,616,743 $29.87 $164,444 
Granted8,230,406 25.11 
Vested(13,668,092)18.89 
Cancelled(969,748)36.14 
Balances at December 31, 20239,209,309 $41.14 $366,991 
Schedule of Weighted Average Assumptions Used
The weighted-average assumptions used to estimate the fair value of shares to be issued under the ESPP are as follows:
Year Ended December 31,
202320222021
Weighted-average expected term1.251.251.25
Expected volatility62 %62 %44 %
Risk-free interest rate4.94 %3.35 %0.17 %
Dividend yield0 %0 %0 %
The weighted-average assumptions used to estimate the fair value of stock options granted are as follows:
Year Ended December 31,
20232021
Weighted-average expected term5.465.21
Expected volatility69 %43 %
Risk-free interest rate4.21 %0.48 %
Dividend yield0 %0 %
Schedule of Stock Options Activity Under the Plan
A summary of the stock option activities is as follows (in thousands, except share and per share data):
Number of
Options		Weighted
Average
Exercise
Price Per
Share		Weighted
Average
Remaining
Contractual
Term (Years)
Balances at December 31, 202212,715,804 $6.38 6.8
Granted31,074 25.55 
Exercised(2,826,105)7.40 
Forfeited(106,141)9.43 
Balances at December 31, 20239,814,632 $6.11 5.8
Vested and exercisable at December 31, 20239,402,839 $5.87 5.7
Vested and expected to vest at December 31, 20238,437,259 $6.57 6.0
Schedule of Stock-based Payment Arrangement Expenses
The Company recognized stock-based compensation expense for all equity awards for the periods indicated as follows (in thousands):
Year Ended December 31,
202320222021
Cost of revenue$5,229 $6,307 $2,335 
Sales and marketing79,879 41,533 15,224 
Research and development230,806 94,319 63,344 
General and administrative47,193 49,453 52,274 
Total stock-based compensation expense$363,107 $191,612 $133,177