Quarterly report pursuant to Section 13 or 15(d)

Warrants - Warrant derivative liability (Details)

v3.21.2
Warrants - Warrant derivative liability (Details) - $ / shares
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jun. 24, 2020
Mar. 17, 2020
Dec. 19, 2019
Nov. 04, 2019
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
May 31, 2019
Dec. 31, 2020
Sep. 30, 2021
Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]                      
Warrants acquired (in shares)               118,804      
Warrants acquired (in dollars per share)               $ 23.40      
Issued (in shares)   167,206 156,250 1,834   95,043 331,771     548,110 8,321,412
Warrants, exercise price (in dollars per share)   $ 9.72 $ 30.00 $ 30.00   $ 3.90 $ 4.50        
Warrants, modified exercise price (in dollars per share) $ 25.50 $ 9.72       $ 3.90 $ 4.50        
Warrants exercised (in shares)                 281,282 389,881 322,948
Warrants expired (in shares)         418,721         641,642 911,776