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

STOCKHOLDERS' EQUITY - Restricted Stock Agreements (Details)

v3.21.1
STOCKHOLDERS' EQUITY - Restricted Stock Agreements (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2018
Mar. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2015
Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share price           $ 3.34
Weighted-average remaining contractual term (in years)   7 years 6 months 3 days 7 years 9 months 7 years 10 months 2 days    
Amount of convertible notes issued $ 0.2          
Shares issues upon conversion 340,923          
Accrued interest rate 2.57%          
Repurchase of common stock 76,461          
Unvested restricted stock units outstanding            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares issued         34,010,977  
Share price         $ 0.0001  
Weighted-average remaining contractual term (in years)   1 year 7 months 6 days