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 Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Sep. 28, 2020
USD ($)
Dec. 31, 2020
USD ($)
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            
Expenses recognized | $     $ 3,600            
Granted (in shares)           8,463,000      
Unrecognized stock-based compensation expense, stock options | $   $ 13,700   $ 12,500   $ 13,700 $ 13,000    
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      
Compensation expenses | $ $ 1,800     $ 2,217 $ 1,259 $ 8,006 $ 5,215    
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 | $         $ 100 $ 100 $ 600    
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 | $         $ 800 $ 29,800 $ 10,100    
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%