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

Debt - Notes payable (Q1) (Details)

v3.21.1
Debt - Notes payable (Q1) (Details) - USD ($)
3 Months Ended 12 Months Ended
Jun. 24, 2020
Jan. 13, 2020
Jan. 06, 2020
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Jun. 30, 2020
Dec. 19, 2019
Nov. 04, 2019
Debt Instruments [Abstract]                    
Debt outstanding       $ 31,089,000   $ 32,611,000        
Common stock, issued (in shares)       66,004,348   51,908,398 47,977,390      
Notes payable, net       $ 19,609,000   $ 18,910,000 $ 16,370,000      
Licensing arrangement                    
Debt Instruments [Abstract]                    
Termination fee paid   $ 100,000                
Common stock, issued (in shares)   72,720                
Termination fee payable   $ 100,000                
Common stock purchase warrant issuable   $ 150,000                
November 2019 Notes                    
Debt Instruments [Abstract]                    
Default interest rate     12.00%              
Subordinated convertible notes | Executive Officer                    
Debt Instruments [Abstract]                    
Notes payable, net             100,000      
Interest expense (less than)       100,000 $ 100,000          
Subordinated convertible notes | Director                    
Debt Instruments [Abstract]                    
Notes payable, net           2,200,000 1,400,000 $ 800,000    
Interest expense (less than)           200,000 100,000      
November 2019 Notes                    
Debt Instruments [Abstract]                    
Debt outstanding       $ 2,927,000   $ 2,830,000 $ 2,769,000      
Long-term debt, interest rate       10.00%   10.00% 10.00%     10.00%
Conversion price (in dollars per share) $ 3.75                 $ 4.00
Increase in fair value, adjustment to paid in capital $ 300,000                  
Debt issuance costs and discounts       $ 200,000   $ 300,000 $ 100,000      
Face amount                   $ 2,800,000
Seller Notes                    
Debt Instruments [Abstract]                    
Long-term debt, interest rate                 10.00%  
Conversion price (in dollars per share) $ 3.75               $ 4.00  
Increase in fair value, adjustment to paid in capital $ 300,000                  
Senior Seller Notes                    
Debt Instruments [Abstract]                    
Debt outstanding       $ 10,679,000   $ 10,332,000 $ 9,191,000      
Long-term debt, interest rate       10.00%   10.00% 10.00%      
Debt issuance costs and discounts       $ 700,000   $ 800,000 $ 900,000      
Face amount                 $ 10,000,000.0  
Junior Seller Notes                    
Debt Instruments [Abstract]                    
Debt outstanding       $ 5,153,000   $ 4,973,000 $ 4,410,000      
Long-term debt, interest rate       10.00%   10.00% 10.00%      
Debt issuance costs and discounts       $ 500,000   $ 500,000 $ 500,000      
Face amount                 $ 5,000,000.0  
ABG Notes                    
Debt Instruments [Abstract]                    
Debt outstanding       $ 702,000   $ 687,000 0      
Long-term debt, interest rate   10.00%   10.00%   10.00%        
Conversion price (in dollars per share) $ 3.75 $ 4.00                
Increase in fair value, adjustment to paid in capital $ 100,000                  
Debt issuance costs and discounts       $ 100,000   $ 100,000        
Face amount   $ 600,000                
ABG Notes | Licensing arrangement                    
Debt Instruments [Abstract]                    
Long-term debt, interest rate   10.00%                
Face amount   $ 600,000                
June 2020 Notes                    
Debt Instruments [Abstract]                    
Debt outstanding       $ 148,000   $ 88,000 $ 0      
Long-term debt, interest rate 10.00%     10.00%   10.00%        
Conversion price (in dollars per share) $ 0.75                  
Debt issuance costs and discounts       $ 1,500,000   $ 1,500,000        
Face amount $ 1,500,000