Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Details 5)

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Stockholders' Equity (Details 5)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Stockholders Equity Details 5    
Average risk-free interest rate 2.15% 1.57%
Average expected life- years 5 years 8 months 2 days 5 years 18 days
Expected volatility 87.24% 87.74%
Expected dividends 0.00% 0.00%