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Long-Term Debt And Credit Facilities (Narrative) (Details)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jan. 31, 2013
USD ($)
Aug. 08, 2012
USD ($)
Sep. 30, 2016
USD ($)
Nov. 30, 2011
USD ($)
Sep. 30, 2016
USD ($)
Sep. 30, 2017
USD ($)
Sep. 30, 2016
USD ($)
Dec. 31, 2016
USD ($)
Nov. 07, 2017
USD ($)
May 10, 2016
USD ($)
Dec. 31, 2015
USD ($)
Debt Instrument [Line Items]                      
Cash and cash equivalents     $ 9,244,783   $ 9,244,783 $ 4,487,066 $ 9,244,783 $ 8,501,392     $ 5,593,582
Payments of debt             13,020,780 13,000,000      
Gain on debt extinguishment         5,632,171   5,632,171        
Healthcare Royalty Partners Debt [Member]                      
Debt Instrument [Line Items]                      
Amount of debt extinguished     18,100,000                
Deferred financing costs     300,000   300,000   300,000        
Accrued interest     500,000   $ 500,000   $ 500,000        
Payments of debt     $ 13,000,000                
Gain on debt extinguishment               $ 5,600,000      
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           $ 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)  
Total liquidity           $ 7,500,000          
Line of credit facility, amount outstanding           0          
Line of credit facility, current borrowing capacity           $ 3,000,000          
Annual interest rate           7.00%          
Revolving Credit Facility [Member] | Subsequent Event [Member]                      
Debt Instrument [Line Items]                      
Line of credit facility, maximum borrowing capacity                 $ 5,000,000    
Annual interest rate                 5.75%    
Minimum [Member] | Revolving Credit Facility [Member]                      
Debt Instrument [Line Items]                      
Liquidity ratio                   1.50