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

Net loss per share (FY) (Details)

v3.21.1
Net loss per share (FY) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Net Income (Loss) Attributable to Parent [Abstract]        
Net and comprehensive loss available to common stockholders $ (12,850) $ (9,454) $ (59,335) $ (184,462)
Less: Preferred stock dividends 0 34 103 109
Add: Adjustment due to gain on Series E Exchange     (5,415) 0
Less: Adjustment due to BCF of Series F Shares     5,349 0
Adjusted Net and comprehensive loss available to common stockholders $ (13,252) $ (9,488) $ (59,372) $ (184,571)
Weighted Average Number of Shares Outstanding, Diluted [Abstract]        
Weighted average shares used in computing net loss per share attributable to common stockholders, basic and diluted (in shares) 57,525,054 48,526,396 49,084,432 33,238,600
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share) $ (0.23) $ (0.20) $ (1.21) $ (5.55)