Annual report pursuant to Section 13 and 15(d)

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

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Convertible Preferred Stock and Stockholders' Equity - Activity related to restricted stock award (Details) - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
2020 Stock Incentive Plan    
Shares    
Granted 209,012 0
Restricted Stock    
Shares    
Non-vested as of January 87,169 47,146
Granted 676,900 102,669
Vested (30,864) (58,096)
Forfeited (4,950) (4,550)
Non-vested as of December 728,255 87,169
Weighted-Average Grant Date Fair Value    
Non-vested as of January $ 2.26 $ 19.56
Granted 3.53 2.41
Vested 2.31 15.69
Forfeited 3.08 13.48
Non-vested as of December $ 3.43 $ 2.26
Restricted Stock | 2020 Stock Incentive Plan    
Shares    
Non-vested as of January 626,974 0
Granted 20,500 637,824
Vested (209,012) 0
Forfeited 0 (10,850)
Non-vested as of December 438,462 626,974
Weighted-Average Grant Date Fair Value    
Non-vested as of January $ 2.29 $ 0
Granted 3.81 2.29
Vested 2.44 0
Forfeited 0 2.27
Non-vested as of December $ 2.28 $ 2.29