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Financing Instruments - Chairman of the Board Commitment (Details) - USD ($)
3 Months Ended
Sep. 07, 2016
Apr. 30, 2016
Apr. 21, 2016
Mar. 14, 2016
Nov. 12, 2015
Dec. 31, 2015
Dec. 10, 2013
Debt Instrument [Line Items]              
Repayments of debt   $ 2,000,000          
Board of Directors Chairman [Member]              
Debt Instrument [Line Items]              
Granted in period (in shares)         500,000    
Share price (in USD per share)       $ 0.40 $ 0.294    
Term of stock option acquisition rights (years)       3 years 8 years    
Grant date fair value of options awards         $ 47,000    
Repayments of related party debt           $ 500,000  
Repurchase of principal           $ 150,000  
Secured Debt [Member] | Note Purchase Agreement              
Debt Instrument [Line Items]              
Maximum borrowing capacity             $ 7,200,000.0
Repayments of debt $ 5,800,000   $ 1,900,000