Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Narrative (Details)

v3.10.0.1
Long-Term Debt - Narrative (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Debt Instrument [Line Items]      
Long-term debt, net $ 4,981,000    
Accretion expense 152,000 $ 179,000  
Success fee     $ 250,000
Current share price (in dollars per share)     $ 8.00
Contingent success fee liability 34,000    
Debt covenant, unrestricted cash 5,269,000    
Cash $ 7,655,000 $ 27,813,000 $ 16,846,000
Interest rate 9.96%    
Loan Agreement      
Debt Instrument [Line Items]      
Borrowing capacity     $ 7,000,000
Variable rate     5.41%
Debt term 36 months    
Long-term debt, net $ 245,000    
Accretion expense $ 178,000