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Debt - Iliad Note (Details) - USD ($)
1 Months Ended 9 Months Ended
Nov. 29, 2019
Nov. 25, 2019
Jan. 31, 2020
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Debt Instrument [Line Items]            
Percentage of gross proceeds used to make payments on note     10.00%      
Gross proceeds     $ 275,000      
Payments on the Iliad Note       $ 976,000 $ 0  
Note Purchase Agreement            
Debt Instrument [Line Items]            
Principal amount   $ 1,300,000        
Issue discount   142,000        
Purchase price   1,100,000        
Unamortized debt issuance costs   $ 15,000        
Borrowing rate   8.00%        
Prepayment premium 15.00%          
Repurchase amount (up to)   $ 150,000        
Percentage increase due to deferral of redemption option       1.50%    
Total liability, net of discount and financing fees       $ 200,000   $ 1,000,000.0
Unamortized issuance costs at date of issuance       $ 100,000   $ 100,000
Increase in amount outstanding from becoming delisted 15.00%          
Percentage of gross proceeds used to make payments on note 10.00%          
Payments on the Iliad Note     $ 226,000      
Increase in amount outstanding from insolvency and bankruptcy event 5.00%          
Interest rate after insolvency and bankruptcy events 22.00%          
Note Purchase Agreement | Minimum            
Debt Instrument [Line Items]            
Increase in amount outstanding from default event 5.00%          
Note Purchase Agreement | Maximum            
Debt Instrument [Line Items]            
Increase in amount outstanding from default event 15.00%          
Note Purchase Agreement | Debt Instrument, Period Two            
Debt Instrument [Line Items]            
Prepayment premium 10.00%