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
 1 Months Ended 3 Months Ended 12 Months Ended
Mar. 17, 2020
Dec. 19, 2019
Nov. 04, 2019
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
May 31, 2019
Mar. 31, 2021
Dec. 31, 2020
Dec. 31, 2020
Warrants                    
Warrants outstanding (in shares)               59,501,978   16,981,854
Warrants acquired (in shares)             712,823      
Issued (in shares) 1,003,232 937,500 11,000   570,258 1,990,624   3,288,400   49,928,469
Exercised (in shares)               (1,839,275) (1,687,690) (1,937,690)
Terminated/Expired (in shares)       (2,512,321)       (76,926)   (5,470,655)
Warrants outstanding (in shares)       59,501,978       60,874,177 59,501,978 59,501,978
Exercise Price                    
Warrants outstanding (in dollars per share)               $ 1.22   $ 3.23
Warrants acquired (in dollars per share)             $ 3.90      
Issued (in dollars per share)               1.45   0.77
Warrants exercised (in dollars per share)               0.76   0.58
Terminated/Expired (in dollars per share)               0.65   3.07
Warrants outstanding (in dollars per share)       $ 1.22       $ 1.18 $ 1.22 $ 1.22
Warrants outstanding, intrinsic value       $ 23.8       $ 31.3 $ 23.8 $ 23.8