General form of registration statement for all companies including face-amount certificate companies

Warrants - Warrant derivative liability (Q1) (Details)

v3.21.1
Warrants - Warrant derivative liability (Q1) (Details) - $ / shares
 1 Months Ended 3 Months Ended 8 Months Ended 12 Months Ended
Nov. 30, 2020
Jul. 20, 2020
Jun. 24, 2020
Mar. 17, 2020
Dec. 19, 2019
Nov. 04, 2019
May 06, 2019
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
May 31, 2019
Mar. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]                              
Warrants acquired (in shares)             712,823       712,823        
Warrants acquired (in dollars per share)             $ 3.90       $ 3.90        
Issued (in shares) 400,000 200,000 1,000,000 1,003,232 937,500 11,000     570,258 1,990,624   3,288,400   17,414,030 49,928,469
Warrants, exercise price (in dollars per share) $ 1.00 $ 1.05 $ 1.25 $ 1.62 $ 5.00 $ 5.00     $ 0.65 $ 0.75          
Warrants, modified exercise price (in dollars per share)     $ 4.25 $ 1.62         $ 0.65 $ 0.75          
Warrants exercised (in shares)                       1,839,275 1,687,690 1,144,999 1,937,690
Warrants expired (in shares)               2,512,321       76,926     5,470,655