Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Details 3)

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Stockholders' Equity (Details 3) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Stockholders' equity (deficit):    
Share-based compensation expense $ 1,245,601 $ 1,187,100