Quarterly report pursuant to Section 13 or 15(d)

RELATED PARTIES (Details)

v3.21.2
RELATED PARTIES (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2017
Jul. 31, 2016
Dec. 31, 2020
Sep. 30, 2021
Dec. 31, 2019
Jun. 30, 2019
Related Party Transaction [Line Items]            
Employee portion of payroll taxes paid     $ 0.2      
Former President and CEO            
Related Party Transaction [Line Items]            
Due from former President and CEO       $ 6.4    
Accounts payable     0.4 0.4    
Former President and CEO | Accrued Expenses            
Related Party Transaction [Line Items]            
Payroll taxes payable     6.2 $ 6.2    
Former President and CEO | Prepaid Expenses and Other            
Related Party Transaction [Line Items]            
Due from former President and CEO           $ 6.2
Impairment charge related to previously recorded receivable     $ 6.2      
Former President and CEO | Selling, General and Administrative Expenses            
Related Party Transaction [Line Items]            
Employer portion of FICA taxes         $ 0.2  
Stock options | Former President and CEO            
Related Party Transaction [Line Items]            
Extension of period to exercise stock options         5 years  
Unvested options vested (shares)       11,300,000    
Weighted average exercise price of outstanding vested options (in USD per share)       $ 0.42    
Stock options issued (shares) 5,000,000 6,000,000        
Unvested stock options outstanding (shares)       6,750,000    
Stock based compensation expense         $ 2.7  
Restricted Stock Units (RSUs) | Former President and CEO            
Related Party Transaction [Line Items]            
Stock based compensation expense         $ 5.1  
Vested RSU's (shares)         2,950,000