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Financing Instruments - Chairman of the Board Commitment (Details) - USD ($)
3 Months Ended
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 [Member]            
Debt Instrument [Line Items]            
Maximum borrowing capacity           $ 7,200,000.0
Repayments of debt   $ 1,900,000