Quarterly report pursuant to Section 13 or 15(d)

Stock Purchase Warrants (Details)

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Stock Purchase Warrants (Details) - $ / shares
1 Months Ended 3 Months Ended 12 Months Ended
Dec. 26, 2017
Nov. 18, 2016
Mar. 31, 2018
Dec. 31, 2017
Closing stock price $ 0.53 $ 1.75 $ 0.32 $ 0.51
Expected dividends 0.00% 0.00% 0.00% 0.00%
Expected volatility 85.00% 95.00% 80.00% 80.00%
Risk free interest rate 2.42% 1.39% 2.19% 1.86%
Expected life of warrant (years) 4 years 11 months 1 day 5 years 1 year 6 months 18 days 1 year 9 months 14 days
Series A Warrants [Member]        
Closing stock price   $ 0.89 $ 0.32 $ 0.51
Expected dividends   0.00% 0.00% 0.00%
Expected volatility   85.00% 80.00% 80.00%
Risk free interest rate   1.58% 2.35% 1.97%
Expected life of warrant (years)   4 years 2 years 7 months 6 days 2 years 10 months 24 days