Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt (Details Textual)

v3.19.3
Long-Term Debt (Details Textual)
9 Months Ended
Sep. 30, 2019
USD ($)
$ / shares
May 30, 2019
Dec. 31, 2018
USD ($)
shares
Sep. 30, 2018
USD ($)
Debt Instrument [Line Items]        
Restricted cash $ 900,000   $ 0 $ 0
Additional warrant issuances 10.00%      
Warrants expiration period 5 years 7 years    
Warrant exercise price percentage 110.00%      
Warrant liability $ 19,901,139   965,747  
Effect of reclassification of warrants 857,072      
Marathon Tranche One Loan        
Debt Instrument [Line Items]        
Face amount     10,000,000  
Periodic payment, principal 500,000      
Marathon Tranche Two Loan        
Debt Instrument [Line Items]        
Restricted cash 900,000      
Revolving Loan        
Debt Instrument [Line Items]        
Revolving loan     $ 25,000,000  
Credit Agreement        
Debt Instrument [Line Items]        
Liquid Assets $ 4,000,000.0      
Warrants to purchase common stock (in shares) | shares     8,053,390  
Exercise price of warrants (in usd per share) | $ / shares $ 1.25      
Maximum        
Debt Instrument [Line Items]        
Class of warrant holder percentage     19.99%  
Maximum | Credit Agreement        
Debt Instrument [Line Items]        
Total debt to EBITDA 4.50      
Debt service coverage ratio 1.25