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Warrants (Warrants Classified as Equity) (Details) - $ / shares
Jul. 29, 2016
May 08, 2013
Jul. 13, 2016
May 10, 2016
May 09, 2016
Jan. 12, 2016
Mar. 18, 2015
Class of Warrant or Right [Line Items]              
Warrants granted, number of shares (in shares)   1,000,000          
Exercise price (usd per share)   $ 2.47   $ 1.51   $ 1.42 $ 2.08
Fair value assumptions, expected volatility rate   77.13%          
Fair value assumptions, expected term (in years)   5 years 6 months          
Fair value assumptions, risk free interest rate   1.26%          
Fair value assumptions, expected dividend rate   0.00%          
Fair value of warrants granted (usd per share)   $ 0.87          
Subsequent Event [Member]              
Class of Warrant or Right [Line Items]              
Warrants granted, number of shares (in shares) 1,000,000            
Exercise price (usd per share) $ 0.43   $ 0.65   $ 1.51    
Fair value assumptions, expected volatility rate 106.63%            
Fair value assumptions, expected term (in years) 5 years 6 months            
Fair value assumptions, risk free interest rate 1.35%            
Fair value assumptions, expected dividend rate 0.00%            
Fair value of warrants granted (usd per share) $ 0.27