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STOCK-BASED COMPENSATION - Summary of Stock Option Activity (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Number of Shares Outstanding    
Outstanding, beginning balance (in shares) 2,264  
Granted (in shares) 0  
Exercised (in shares) (194)  
Canceled (in shares) 0  
Outstanding, ending balance (in shares) 2,070  
Shares outstanding, vested and expected to vest (in shares) 2,070  
Shares outstanding, exercisable (in shares) 2,070  
Weighted- Average Exercise Price per Share    
Outstanding, beginning balance (in usd per share) $ 1.90  
Granted (in usd per share) 0  
Exercised (in usd per share) 2.09  
Canceled (in usd per share) 0  
Outstanding, ending balance (in usd per share) 1.89  
Weighted-average exercise price, vested and expected (in usd per share) 1.89  
Weighted-average exercise price, exercisable (in usd per share) $ 1.89  
Weighted-Average Remaining Contractual Term    
Outstanding 2 years 7 months 6 days  
Vested and expected to vest 2 years 7 months 6 days  
Exercisable 2 years 7 months 6 days  
Aggregate Intrinsic Value    
Outstanding $ 413,757
Exercised 42,091  
Vested and expected to vest 413,757  
Exercisable $ 413,757  
Share price (in usd per share) $ 201.78