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Long-Term Debt And Credit Facilities (Narrative) (Details) - USD ($)
1 Months Ended 12 Months Ended
Jan. 31, 2013
Aug. 08, 2012
Nov. 30, 2011
Sep. 30, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Debt Instrument [Line Items]              
Principal amount of long term debt         $ 0 $ 0  
Total liquidity         6,400,000    
Cash and cash equivalents         3,686,302 8,501,392 $ 5,593,582
Payments of debt           13,020,780  
Gain on debt extinguishment           5,632,171  
Healthcare Royalty Partners Debt [Member]              
Debt Instrument [Line Items]              
Amount of debt extinguished       $ 18,100,000      
Deferred financing costs       300,000      
Accrued interest       500,000      
Payments of debt       $ 13,000,000 $ 13,000,000    
Term Loan [Member] | Healthcare Royalty Partners Debt [Member]              
Debt Instrument [Line Items]              
Amount borrowed $ 2,500,000 $ 2,500,000 $ 15,000,000        
Additional amount which may be borrowed     $ 5,000,000        
Percentage of royalties entitled to receive     100.00%        
Maturity date         Dec. 31, 2018    
Annual interest rate     16.00%        
Revolving Credit Facility [Member]              
Debt Instrument [Line Items]              
Line of credit facility, maximum borrowing capacity         $ 5,000,000 $ 10,000,000  
Line of credit facility, maturity date         Mar. 31, 2018    
Minimum tangible net worth requirement, period one         $ (24,000,000)    
Minimum tangible net worth requirement, period two         (24,500,000)    
Line of credit facility, amount outstanding         0    
Line of credit facility, current borrowing capacity         $ 2,700,000    
Annual interest rate         5.75% 7.00%  
Minimum [Member] | Revolving Credit Facility [Member]              
Debt Instrument [Line Items]              
Liquidity ratio         1.50