Quarterly report pursuant to Section 13 or 15(d)

Note Payable and Term Loan Agreement - Term Loan Agreement and Revenue Interest Agreement (Details)

v3.5.0.2
Note Payable and Term Loan Agreement - Term Loan Agreement and Revenue Interest Agreement (Details) - USD ($)
Nov. 12, 2014
Sep. 30, 2016
Dec. 31, 2015
Nov. 13, 2014
Debt Instrument [Line Items]        
Shares of common stock sold   30,209,036 29,984,591  
Value of common stock sold   $ 302,090 $ 299,846  
Three Peaks        
Debt Instrument [Line Items]        
Shares of common stock sold 1,375,969      
Value of common stock sold $ 3,550,000      
Public offering price (in dollars per share) $ 2.58      
Term Loan | Three Peaks        
Debt Instrument [Line Items]        
Term 6 years      
Interest payable 9.00%      
Face amount $ 25,000,000      
Interest rate spread 1.00%      
Effective interest rate (as a percent)   10.00% 10.00% 10.00%
Upon certain events, the percentage of outstanding principal amount of the Term Loan the Company has the option to prepay and the lender has a right to demand payment for on or prior to the first anniversary of the applicable Closing Date 120.00%      
Upon certain events, the percentage of outstanding principal amount of the Term Loan the Company has the option to prepay and the lender has a right to demand payment for after the first anniversary but before the second anniversary of the applicable Closing Date 135.00%      
Upon certain events, the percentage of outstanding principal amount of the Term Loan the Company has the option to prepay and the lender has a right to demand payment for after the second anniversary but before the third anniversary of the applicable Closing Date 150.00%      
Upon certain events, the internal rate of return of the outstanding principal amount of the Term Loan the Company has the option to prepay and the lender has a right to demand after the third anniversary of the applicable Closing Date 16.25%      
Upon certain events, the additional percentage of the originally advanced Term Loan amount owed 3.00%      
Revenue Interest Purchase Agreement | Three Peaks        
Debt Instrument [Line Items]        
Term 10 years      
Royalty percentage on net revenue 3.75%      
Revenue Interest Purchase Agreement | Three Peaks | Maximum        
Debt Instrument [Line Items]        
Royalty revenue per year $ 30,000,000