Quarterly report pursuant to Section 13 or 15(d)

Convertible Preferred Stock and Stockholders' Equity (Deficit) - Activity related to restricted stock award (Details)

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Convertible Preferred Stock and Stockholders' Equity (Deficit) - Activity related to restricted stock award (Details) - $ / shares
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2021
2020 Stock Incentive Plan    
Shares    
Non-vested as of January 1, 2021   626,974
Granted   20,500
Vested   (201,343)
Forfeited   0
Non-vested as of September 30, 2021 446,131 446,131
Weighted-Average Grant Date Fair Value    
Non-vested as of January 1, 2021   $ 2.29
Granted   3.81
Vested   2.27
Forfeited   0
Non-vested as of September 30, 2021 $ 2.36 $ 2.36
Restricted Stock    
Shares    
Non-vested as of January 1, 2021   87,169
Granted   664,500
Vested   (29,064)
Forfeited   0
Non-vested as of September 30, 2021 722,605 722,605
Weighted-Average Grant Date Fair Value    
Non-vested as of January 1, 2021   $ 2.26
Granted   3.57
Vested   2.26
Forfeited   0
Non-vested as of September 30, 2021 $ 3.46 $ 3.46
Restricted Stock | 2020 Stock Incentive Plan    
Shares    
Vested (201,343) (201,343)