Post-effective amendment to a registration statement that is not immediately effective upon filing

STOCK BASED COMPENSATION - Stock Incentive Plan (Details)

v3.21.1
STOCK BASED COMPENSATION - Stock Incentive Plan (Details)
$ in Millions
1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2020
USD ($)
shares
Jul. 31, 2020
USD ($)
employee
Mar. 31, 2021
USD ($)
shares
Mar. 31, 2020
USD ($)
shares
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
shares
Dec. 31, 2018
shares
Dec. 31, 2015
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Vesting period         1 year      
Number of employees affected by repricing | employee   116            
Granted (in shares)         8,463,000      
Expenses recognized | $   $ 3.6            
Unrecognized stock-based compensation expense, stock options | $ $ 13.7   $ 12.5   $ 13.7 $ 13.0    
Weighted-average period     3 years 1 month 6 days   2 years 9 months 18 days      
Shares available for grant 14,379,052   14,140,956   14,379,052      
Consultant                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Granted (in shares)       12,212 12,212 119,581    
Fair value of shares | $       $ 0.1 $ 0.1 $ 0.6    
Employee                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Granted (in shares)     0 473,624 8,450,799 5,730,586    
Fair value of shares | $       $ 0.8 $ 29.8 $ 10.1    
Share-based Payment Arrangement, Nonemployee [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Granted (in shares)     0          
2015 stock incentive plan                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Awards made under the plan               26,283,789
Vesting period               4 years
Expiration period               10 years
Make Plan                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Vesting period           4 years 4 years  
Expiration period           10 years 10 years  
Options and warrants to be issued           232,304 232,304  
Granted (in shares)           0 0  
2020 Plan                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Common stock available for future issuance 12,400,813       12,400,813      
Percentage of stock outstanding 5.00%