Registration of securities issued in business combination transactions

STOCK BASED COMPENSATION - Stock Incentive Plan (Details)

v3.21.2
STOCK BASED COMPENSATION - Stock Incentive Plan (Details)
$ in Millions
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jan. 01, 2021
shares
Dec. 31, 2020
USD ($)
shares
Jul. 31, 2020
USD ($)
employee
Jun. 30, 2021
USD ($)
shares
Jun. 30, 2020
USD ($)
shares
Jun. 30, 2021
USD ($)
shares
Jun. 30, 2020
USD ($)
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 | $     $ 3.6                
Granted (in shares)               8,463,000      
Unrecognized stock-based compensation expense, stock options | $   $ 13.7   $ 11.2   $ 11.2   $ 13.7 $ 13.0    
Weighted-average period           2 years 10 months 24 days   2 years 9 months 18 days      
Shares available for grant   14,379,052   21,810,237   21,810,237   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 4,182,389 0 4,656,013 8,450,799 5,730,586    
Fair value of shares | $         $ 2.9   $ 3.6 $ 29.8 $ 10.1    
Non-employee                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Granted (in shares)       0 0 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%                  
Additional shares added to the plan 11,337,837