Annual report pursuant to Section 13 and 15(d)

Warrants - Outstanding (Details)

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Warrants - Outstanding (Details) - $ / shares
 1 Months Ended 3 Months Ended 12 Months Ended
Nov. 30, 2020
Jul. 20, 2020
Jun. 24, 2020
Mar. 17, 2020
Dec. 19, 2019
Nov. 04, 2019
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Jun. 30, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Warrants                          
Warrants outstanding (in shares)                       9,916,997 2,830,309
Issued (in shares) 66,667 33,334 166,668 167,206 156,250 1,834   95,043 331,771     548,110 8,321,412
Exercised (in shares)                   (83,334) (281,282) (389,881) (322,948)
Terminated/Expired (in shares)             (418,721)         (641,642) (911,776)
Warrants outstanding (in shares)             9,916,997       9,916,997 9,433,584 9,916,997
Exercise Price                          
Warrants outstanding (in dollars per share)                       $ 7.32 $ 19.38
Issued (in dollars per share)                       8.70 4.62
Exercised (in dollars per share)                       4.52 3.48
Terminated/Expired (in dollars per share)                       24.64 18.42
Warrants outstanding (in dollars per share)             $ 7.32       $ 7.32 $ 5.92 $ 7.32