Quarterly report pursuant to Section 13 or 15(d)

Stock Purchase Warrants (Details)

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Stock Purchase Warrants (Details) - Stock Warrants [Member] - $ / shares
3 Months Ended 12 Months Ended
Oct. 10, 2014
Mar. 31, 2016
Dec. 31, 2015
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]      
Closing stock price $ 1.75 $ 2.36 $ 2.29
Expected dividends 0.00% 0.00% 0.00%
Expected volatility 95.00% 90.00% 85.00%
Risk free interest rate 1.39% 0.96% 1.49%
Expected life of warrant 5 years 3 years 6 months 14 days 3 years 9 months 14 days