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Stockholders' Equity (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Allocated Share-based Compensation Expense $ 58,113 $ 243,536 $ 781,390 $ 1,124,970
Research and Development Expense [Member]        
Allocated Share-based Compensation Expense 27,072 151,580 313,247 451,662
General and Administrative Expense [Member]        
Allocated Share-based Compensation Expense $ 31,041 $ 91,956 $ 468,143 $ 673,308