Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)	Preferred Stock [Member] Series B Convertible Preferred Stock [Member]	Preferred Stock Additional Paid-in Capital [Member] Series B Convertible Preferred Stock [Member]	Common Stock [Member]	Common Stock Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2017			2,651,952
Balance at Dec. 31, 2017			$ 477,342	$ 71,887,674	$ (65,426,329)	$ 6,938,687
Amortization of commitment shares				(19,852)		(19,852)
Compensation cost for stock options granted				215,139		215,139
Net loss					(1,874,382)	(1,874,382)
Balance (in shares) at Mar. 31, 2018			2,651,952
Balance at Mar. 31, 2018			$ 477,342	72,082,961	(67,300,711)	5,259,592
Balance (in shares) at Dec. 31, 2017			2,651,952
Balance at Dec. 31, 2017			$ 477,342	71,887,674	(65,426,329)	6,938,687
Amortization of commitment shares						(39,703)
Net loss						(6,016,959)
Balance (in shares) at Jun. 30, 2018	5,802		4,874,099
Balance at Jun. 30, 2018	$ 6	5,801,994	$ 877,329	78,330,724	(71,443,288)	13,566,765
Balance (in shares) at Mar. 31, 2018			2,651,952
Balance at Mar. 31, 2018			$ 477,342	72,082,961	(67,300,711)	5,259,592
Amortization of commitment shares				(19,851)		(19,851)
Compensation cost for stock options granted				179,050		179,050
Net loss					(4,142,577)	(4,142,577)
Issuance of stock and warrants, net of issuance costs (in shares)	13,624
Issuance of Series B convertible preferred stock and warrants, net of issuance costs of $1,333,449	$ 14	6,926,778		5,363,759		12,290,551
Allocation of Series B convertible preferred stock to beneficial conversion feature		(4,782,100)		4,782,100
Deemed dividend on Series B convertible preferred stock		11,479,308		(11,479,308)
Conversion of Series B convertible preferred stock to common stock (in shares)	(7,822)
Conversion of Series B convertible preferred stock to common stock	$ (8)
Conversion of Series B convertible preferred stock to common stock		(7,821,992)	$ 399,987	7,422,013
Conversion of Series B convertible preferred stock to common stock (in shares)			2,222,147
Balance (in shares) at Jun. 30, 2018	5,802		4,874,099
Balance at Jun. 30, 2018	$ 6	5,801,994	$ 877,329	78,330,724	(71,443,288)	13,566,765
Balance (in shares) at Dec. 31, 2018	2,379		5,846,552
Balance at Dec. 31, 2018	$ 2	2,378,997	$ 1,052,372	82,204,902	(76,831,263)	8,805,010
Compensation cost for stock options granted				275,833		275,833
Net loss					(4,073,307)	(4,073,307)
Conversion of Series B convertible preferred stock to common stock (in shares)	(1,677)
Conversion of Series B convertible preferred stock to common stock	$ (1)
Conversion of Series B convertible preferred stock to common stock		(1,676,998)	$ 85,753	1,591,246
Conversion of Series B convertible preferred stock to common stock (in shares)			476,431
Balance (in shares) at Mar. 31, 2019	702		9,122,171
Balance at Mar. 31, 2019	$ 1	701,999	$ 1,641,979	98,056,781	(80,904,570)	$ 19,496,190
Issuance of common stock upon warrant exercise (in shares)			2,799,188			2,800,000
Issuance of common stock upon warrant exercise			$ 503,854	10,832,856		$ 11,336,710
Reclassification of stock-based compensation liability upon option cancellation				3,151,944		3,151,944
Balance (in shares) at Dec. 31, 2018	2,379		5,846,552
Balance at Dec. 31, 2018	$ 2	2,378,997	$ 1,052,372	82,204,902	(76,831,263)	8,805,010
Amortization of commitment shares
Net loss						(11,335,836)
Balance (in shares) at Jun. 30, 2019	676		9,129,563
Balance at Jun. 30, 2019	$ 1	675,999	$ 1,643,309	103,400,247	(88,167,099)	17,552,457
Balance (in shares) at Mar. 31, 2019	702		9,122,171
Balance at Mar. 31, 2019	$ 1	701,999	$ 1,641,979	98,056,781	(80,904,570)	19,496,190
Compensation cost for stock options granted				5,318,796		5,318,796
Net loss					(7,262,529)	(7,262,529)
Conversion of Series B convertible preferred stock to common stock (in shares)	(26)
Conversion of Series B convertible preferred stock to common stock
Conversion of Series B convertible preferred stock to common stock		(26,000)	$ 1,330	24,670
Conversion of Series B convertible preferred stock to common stock (in shares)			7,392
Balance (in shares) at Jun. 30, 2019	676		9,129,563
Balance at Jun. 30, 2019	$ 1	$ 675,999	$ 1,643,309	$ 103,400,247	$ (88,167,099)	$ 17,552,457