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Long-term Debt - Term Loan Narrative (Details) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Sep. 30, 2018
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
May 01, 2019
Apr. 30, 2017
Oct. 31, 2015
Debt Instrument [Line Items]                    
Term loan agreement amount $ 15,000,000                  
Debt drawn down   $ 57,331,000                
Minimum liquidity amount   $ 3,000,000                
Minimum net revenue target       $ 30,000,000 $ 15,000,000 $ 5,000,000 $ 1,000,000      
Equity cure period   90 days                
Scenario, Forecast                    
Debt Instrument [Line Items]                    
Minimum net revenue target     $ 40,000,000              
Term Loan                    
Debt Instrument [Line Items]                    
Term loan agreement amount $ 25,000,000                 $ 30,000,000
Stated interest rate 1075.00%             10.00%    
Interest rate paid-in-kind 275.00%             2.00%    
Interest rate paid in cash 800.00%             8.00%    
Percentage of outstanding loans 25.00%                  
Market capitalization (greater than) $ 250,000,000                  
Term Loan, Tranche A                    
Debt Instrument [Line Items]                    
Term loan agreement amount                   $ 20,000,000
Financing fee                   175.00%
Facility fee                   500.00%
Term Loan, Tranche B                    
Debt Instrument [Line Items]                    
Term loan agreement amount                   $ 10,000,000
Debt drawn down                 $ 5,000,000