Quarterly report pursuant to Section 13 or 15(d)

Description of Business and Summary of Significant Accounting Policies (Details Textual)

v3.19.3
Description of Business and Summary of Significant Accounting Policies (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Description of Business and Summary of Significant Accounting Policies (Textual)          
Accumulated deficit $ (204,155,126)   $ (204,155,126)   $ (186,857,238)
Net loss (6,599,326) $ (6,148,089) (17,296,619) $ (17,334,216)  
Cash and cash equivalents $ 14,312,909 $ 14,805,472 $ 14,312,909 $ 14,805,472 $ 13,673,308