Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details 1)

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Stockholders' Equity (Details 1) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Stockholders' equity:        
Share-based compensation expense $ 208,207 $ 186,982 $ 968,488 $ 616,007