XML 49 R37.htm IDEA: XBRL DOCUMENT v3.23.3
Stock-Based Compensation - Narrative (Details)
 1 Months Ended 3 Months Ended 9 Months Ended
Jan. 31, 2023
shares
Jan. 31, 2022
shares
Aug. 31, 2021
shares
Jun. 30, 2021
performanceCondition
shares
Sep. 30, 2023
USD ($)
shares
Sep. 30, 2022
USD ($)
shares
Sep. 30, 2023
USD ($)
shares
Sep. 30, 2022
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Total stock-based compensation expense | $         $ 16,291,000 $ 24,301,000 $ 54,083,000 $ 78,209,000
Direct Listing                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Total stock-based compensation expense | $           3,800,000   14,600,000
Series A common stock                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Shares available for future issuance         153,257,260   153,257,260  
Series B common stock                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Shares available for future issuance         27,454,426   27,454,426  
2021 Plan                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Annual increase in shares authorized, percent     5.00%          
Number of additional shares authorized 5,766,938 5,735,463            
2021 Plan | Series A common stock                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of shares authorized     11,076,515          
The Plans | Series A common stock                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Options approved for grant (in shares)         20,705,913   20,705,913  
The Founders Grant                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Total stock-based compensation expense | $         $ 10,400,000 $ 18,700,000 $ 35,400,000 $ 58,100,000
Stock options or restricted stock units (RSUs) | 2021 Incentive Award Plan                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Award vesting period     4 years          
Employee Stock Purchase Plan                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of shares authorized     2,215,303          
Number of additional shares authorized 1,153,387 1,147,092 16,614,772          
Shares available for future issuance         4,210,184   4,210,184  
Shares purchased under ESPP (in shares)         0 0 116,936 118,329
Total stock-based compensation expense | $         $ 608,000 $ 638,000 $ 2,020,000 $ 2,095,000
Contributions withheld from employees | $         459,000 $ 539,000 1,455,000 $ 2,126,000
Cost not yet recognized, outstanding awards | $         $ 1,900,000   $ 1,900,000  
Non-vested award, cost not yet recognized, period for recognition             8 months 12 days  
Granted (in shares)         475,916   528,238  
Stock options | The Plans                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Cost not yet recognized, outstanding awards | $         $ 3,100,000   $ 3,100,000  
Non-vested award, cost not yet recognized, period for recognition             7 months 6 days  
Restricted stock units (RSUs)                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Units vested (in shares)             839,551  
Granted (in shares)             1,677,009  
Restricted stock units (RSUs) | 2021 Plan                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Total stock-based compensation expense | $         4,400,000   $ 14,200,000  
Restricted stock units (RSUs) | The Plans                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Non-vested award, cost not yet recognized, period for recognition             1 year 2 months 12 days  
Cost not yet recognized, outstanding awards | $         48,000,000   $ 48,000,000  
Restricted stock units (RSUs) | The Founders Grant                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Award vesting period       5 years        
Granted (in shares)       1,884,724        
Grant date fair value | $             66,900,000  
Performance stock units (PSUs)                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Award expiration period       10 years        
Number of performance conditions | performanceCondition       2        
Terms of award, stock price hurdle period       10 years        
Performance stock units (PSUs) | Monte Carlo simulation                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Grant date fair value | $             $ 128,800,000  
Performance stock units (PSUs) | Series B common stock                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of shares receivable per share based payments award (in shares)       1        
Performance stock units (PSUs) | The Plans                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Non-vested award, cost not yet recognized, period for recognition             7 months 6 days  
Cost not yet recognized, outstanding awards | $         $ 22,300,000   $ 22,300,000  
Performance stock units (PSUs) | The Founders Grant                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Granted (in shares)       4,397,688