Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION - Summary of Stock Options Activity (Details)

v3.22.1
STOCK-BASED COMPENSATION - Summary of Stock Options Activity (Details) - Equity Option - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Number of Shares    
Outstanding beginning balance (in shares) 25,225  
Granted (in shares) 6,900  
Exercised (in shares) (2)  
Forfeited (in shares) (1,960)  
Outstanding ending balance (in shares) 30,163 25,225
Weighted Average Exercise Price    
Outstanding beginning balance (in USD per share) $ 0.48  
Granted (in USD per share) 0.54  
Exercised (in USD per share) 0.26  
Forfeited (in USD per share) 0.58  
Outstanding ending balance (in USD per share) $ 0.49 $ 0.48
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]    
Number of shares, Exercisable (in shares) 24,240  
Number of shares, Vested or expected to vest (in shares) 30,163  
Weighted average exercise price, Exercisable (in USD per share) $ 0.48  
Weighted average exercise price, Vested or expected to vest (in USD per share) $ 0.49  
Outstanding balance, weighted average remaining contract term (in years) 5 years 6 months 5 years 8 months 12 days
Options exercisable, weighted average remaining contract term (in years) 4 years 7 months 6 days  
Options vested or expected to vest, weighted average remaining contract term (in years) 5 years 6 months  
Outstanding, aggregate intrinsic value $ 0 $ 2,186
Options exercisable, aggregate intrinsic value 0  
Options vested or expected to vest, aggregate intrinsic value $ 0