Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION - Narrative (Details)

v3.21.2
STOCK-BASED COMPENSATION - Narrative (Details)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Jun. 21, 2021
shares
Jun. 17, 2021
shares
Dec. 31, 2020
shares
Sep. 30, 2021
USD ($)
shares
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
$ / shares
shares
Sep. 30, 2020
USD ($)
$ / shares
Dec. 31, 2017
$ / shares
shares
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]                
Recapitalization exchange ratio     0.233          
Common stock, shares outstanding 125,753              
Stock-based compensation expense | $       $ 833 $ 1,269 $ 3,680 $ 2,624  
Granted (shares)           128    
Options outstanding (shares)     18,090 15,330   15,330    
Total unrecognized compensation expense, option | $       $ 7,300   $ 7,300    
Remaining average period cost expected to be recognized over           1 year 10 months 24 days    
The total intrinsic value of stock options exercised | $       $ 16,100 $ 200 $ 21,900 $ 200  
Stock options                
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]                
Grant-date fair value (USD per share) | $ / shares           $ 4.01 $ 1.40  
Performance-based stock options                
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]                
Granted (shares)               4,200
Grant-date fair value (USD per share) | $ / shares               $ 0.56
Options outstanding (shares)       100   100    
Class B common stock                
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]                
Common stock, shares outstanding 16,130   18,977 16,130   16,130    
Founder Group | Class B common stock | Founder Group                
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]                
Common stock, shares outstanding 16,130              
Voting percent 74.80%              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares 2,200              
Mr. Pascal                
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]                
Stock-based compensation expense | $           $ 1,100    
2021 Plan                
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]                
Aggregate number of authorized shares   16,700            
Maximum annual increase in number of shares of common stock issued and outstanding   5.00%            
2021 Plan | Stock options                
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]                
Maximum term           10 years    
2021 Plan | Stock options | Minimum                
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]                
Vesting period           3 years    
2021 Plan | Stock options | Maximum                
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]                
Vesting period           4 years    
Exchanged Option                
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]                
Recapitalization exchange ratio 0.233