Quarterly report pursuant to Section 13 or 15(d)

Stockholders Equity and StockBased Compensation (Details 1)

v3.19.3
Stockholders Equity and StockBased Compensation (Details 1) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Research and development expenses $ 751,473 $ 864,060 $ 2,218,826 $ 2,313,124
General and administrative expenses 1,463,568 1,889,401 4,051,484 5,566,022
Total stock-based compensation expense     591,663 1,951,394
Employee Stock Option [Member]        
Research and development expenses 162,000 284,000 728,000
General and administrative expenses 20,000 368,000 308,000 1,223,000
Total stock-based compensation expense $ 20,000 $ 530,000 $ 592,000 $ 1,951,000