Annual report pursuant to Section 13 and 15(d)

SEVERANCE AND REORGANIZATION (Details)

v3.20.4
SEVERANCE AND REORGANIZATION (Details)
1 Months Ended 12 Months Ended
Jul. 31, 2020
USD ($)
numberOfInstallment
$ / shares
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Restructuring and Related Activities [Abstract]        
Severance and reorganization charges | $   $ 6,359,000 $ 0 $ 0
Employee Retention Plan pool | $ $ 12,000,000.0      
Employee Retention Plan, number of vesting installments | numberOfInstallment 4      
Employee Retention Plan, payable period 12 months      
Employee Retention Plan, target measurement period 10 days      
Employee Retention Plan, stock performance targets, stock price one (in USD per share) $ 2.25      
Employee Retention Plan, stock performance targets, stock price two (in USD per share) 3.25      
Employee Retention Plan, stock performance targets, stock price three (in USD per share) 4.25      
Employee Retention Plan, stock performance targets, stock price four (in USD per share) $ 5.25