Quarterly report pursuant to Section 13 or 15(d)

Warrants - Outstanding (Details)

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Warrants - Outstanding (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Warrants    
Warrants outstanding (in shares) 9,433,584 9,916,997
Issued (in shares) 0 548,110
Exercised (in shares) 0 (389,881)
Terminated/Expired (in shares) 0 (641,642)
Warrants outstanding (in shares) 9,433,584 9,433,584
Weighted Average Exercise Price    
Warrants outstanding (in dollars per share) $ 5.92 $ 7.32
Issued (in dollars per share) 0 8.70
Warrants exercised (in dollars per share) 0 4.52
Terminated/Expired (in dollars per share) 0 24.64
Warrants outstanding (in dollars per share) $ 5.92 $ 5.92
Warrants outstanding, intrinsic value $ 0.0 $ 0.0