Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION - Narrative (Details)

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STOCK-BASED COMPENSATION - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended
Mar. 30, 2022
Jan. 01, 2022
Mar. 31, 2022
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Jun. 11, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Unvested options granted       0      
Increase (decrease) in number of shares authorized 8,000,000            
Unrecognized compensation cost     $ 1.0 $ 1.0      
Unrecognized weighted average period       10 months 20 days      
Options Outside the Amended 2013 Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Performance-based options outstanding (shares)     4,250,000 4,250,000      
Unvested stock options outstanding (shares)     6,750,000 6,750,000      
Stock options              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Issuance of common stock from exercise of stock options (shares)       0 0    
Amended 2013 Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Shares authorized under plan (shares)           38,976,000  
Annual increase to shares authorized for issuance under the Plan as percent of common stock outstanding percentage             4.00%
Annual increase to shares authorized for issuance under the Plan (shares)             4,000,000,000
Additional shares authorized (shares)   0          
Shares cancelled (shares)     9,000,000        
Unvested options granted     7,000,000        
Authorized unissued shares reserved and available for issuance upon exercise and conversion of outstanding awards (shares)     4,347,000 4,347,000