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STOCKHOLDERS’ EQUITY (DEFICIT) - Summary of Unvested Options and Changes (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Options    
Granted (in shares) 0 0
Weighted Average Grant Date Fair Value    
Total fair value of options vested $ 8.4  
Stock Options    
Options    
Unvested at beginning of period (in shares) 2,330,000  
Granted (in shares) 0  
Vested (in shares) (1,571,000)  
Forfeited (in shares) (120,000)  
Unvested at end of period (in shares) 639,000 2,330,000
Weighted Average Grant Date Fair Value    
Unvested at beginning of period (in dollars per share) $ 5.51  
Granted (in dollars per share)  
Vested (in dollars per share) 5.34  
Forfeited (in dollars per share) 5.16  
Unvested at end of period (in dollars per share) $ 5.99 $ 5.51