Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Restricted Stock Awards and Restricted Stock Units) (Details)

v3.21.2
Stockholders' Equity (Restricted Stock Awards and Restricted Stock Units) (Details) - $ / shares
9 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Restricted Stock Awards and Restricted Stock Units [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of shares, Unvested balance 18,077,755 15,507,504
Weighted average grant price, Unvested balance $ 2.64 $ 2.49
Restricted Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of shares Granted 2,330,678  
Number of shares, Vested (301,492)  
Weighted average grant price, Granted $ 3.17  
Weighted average grant price, Vested $ 2.75  
Restricted Stock Units (RSUs) [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of shares Granted 1,130,842  
Number of shares, Vested (493,027)  
Number of shares, Forfeited (96,750)  
Weighted average grant price, Granted $ 4.13  
Weighted average grant price, Vested 3.51  
Weighted average exercise price, Forfeited $ 3.49