Quarterly report pursuant to Section 13 or 15(d)

Debt - Notes payable (Details)

v3.21.1
Debt - Notes payable (Details) - USD ($)
3 Months Ended
Jun. 24, 2020
Jan. 13, 2020
Jan. 06, 2020
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 19, 2019
Nov. 04, 2019
Debt Instruments [Abstract]                  
Debt outstanding       $ 31,089,000   $ 32,611,000      
Common stock or units, issued (in shares)       66,004,348   51,908,398      
Notes payable, net       $ 19,609,000   $ 18,910,000      
Licensing arrangement                  
Debt Instruments [Abstract]                  
Termination fee paid   $ 100,000              
Common stock or units, issued (in shares)   72,720              
Termination fee payable   $ 100,000              
Common stock purchase warrant issuable   $ 200,000              
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    
November 2019 Notes                  
Debt Instruments [Abstract]                  
Debt outstanding       $ 2,927,000   $ 2,830,000      
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 $ 300,000                
Debt issuance costs and discounts       $ 200,000   $ 300,000      
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      
Long-term debt, interest rate       10.00%   10.00%      
Debt issuance costs and discounts       $ 700,000   $ 800,000      
Face amount               $ 10,000,000.0  
Junior Seller Notes                  
Debt Instruments [Abstract]                  
Debt outstanding       $ 5,153,000   $ 4,973,000      
Long-term debt, interest rate       10.00%   10.00%      
Debt issuance costs and discounts       $ 500,000   $ 500,000      
Face amount               $ 5,000,000.0  
ABG Notes                  
Debt Instruments [Abstract]                  
Debt outstanding       $ 702,000   $ 687,000      
Long-term debt, interest rate       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%              
June 2020 Notes                  
Debt Instruments [Abstract]                  
Debt outstanding       $ 148,000   $ 88,000      
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