Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION - Narrative (Details)

v3.21.2
STOCK-BASED COMPENSATION - Narrative (Details) - USD ($)
$ in Millions
9 Months Ended
Jan. 01, 2021
Sep. 30, 2021
Dec. 31, 2020
Jun. 11, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation cost   $ 3.0    
Unrecognized weighted average period   1 year 1 month 24 days    
Options Outside the Amended 2013 Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Performance-based options outstanding (shares)   5,000,000    
Unvested stock options outstanding (shares)   8,000,000    
Stock options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Intrinsic value of stock options exercised in the period   $ 0.4    
Amended 2013 Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares authorized under plan (shares)   38,976,000 34,976,000  
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
Additional shares authorized (shares) 4,000,000      
Authorized unissued shares reserved and available for issuance upon exercise and conversion of outstanding awards (shares)   4,247,000