Stock-Based Compensation, Stock-Based Compensation Expense (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Stock-Based Compensation [Abstract]
Stock-based compensation expense	$ 18,580	$ 44,627	$ 2,773,451	$ 51,642
Research and Development [Member]
Stock-Based Compensation [Abstract]
Stock-based compensation expense	9,387	43,997	450,087	47,216
General and Administrative [Member]
Stock-Based Compensation [Abstract]
Stock-based compensation expense	$ 9,193	$ 630	$ 2,323,364	$ 4,426