Condensed Consolidated Statement of Changes in Convertible Preferred Stock and Stockholders' Equity (Unaudited) - USD ($)	Preferred Stock [Member] Series A Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2017	8,306,278	967,976
Balance at Dec. 31, 2017		$ 968	$ 82,783,865	$ (61,554,889)	$ 21,229,944
Stock-based compensation expense			971,832		971,832
Net loss				(12,798,872)	(12,798,872)
Conversion of Series A convertible preferred stock to common stock (in shares)	(8,306,278)	553,752
Conversion of Series A convertible preferred stock to common stock		$ 554	(554)
Issuance of common stock to Series A convertible preferred stockholders under make-whole adjustment feature (in shares)		777,895
Issuance of common stock to Series A convertible preferred stockholders under make-whole adjustment feature		$ 778	(778)
Issuance of common stock related to accrued dividends (in shares)		68,815
Issuance of common stock related to accrued dividends		$ 69	1,148,238		1,148,307
Series A cumulative preferred dividend			(85,993)		(85,993)
Issuance of common stock and warrants, net of issuance costs (in shares)		1,000,000
Issuance of common stock and warrants, net of issuance costs		$ 1,000	10,416,520		10,417,520
Common stock issued for advisory services (in shares)		3,031
Common stock issued for advisory services		$ 3	24,997		25,000
Balance (in shares) at Sep. 30, 2018		3,371,469
Balance at Sep. 30, 2018		$ 3,372	95,258,127	(74,353,761)	20,907,738
Balance (in shares) at Jun. 30, 2018		3,371,469
Balance at Jun. 30, 2018		$ 3,372	94,930,731	(67,634,031)	27,300,072
Stock-based compensation expense			327,396		327,396
Net loss				(6,719,730)	(6,719,730)
Balance (in shares) at Sep. 30, 2018		3,371,469
Balance at Sep. 30, 2018		$ 3,372	95,258,127	(74,353,761)	20,907,738
Balance (in shares) at Dec. 31, 2018		3,376,230
Balance at Dec. 31, 2018		$ 3,377	95,532,881	(79,924,699)	15,611,559
Stock-based compensation expense			385,605		385,605
Net loss				(8,047,299)	(8,047,299)
Issuance of common stock and warrants, net of issuance costs (in shares)		1,317,060
Issuance of common stock and warrants, net of issuance costs		$ 1,317	5,567,633		5,568,950
Balance (in shares) at Sep. 30, 2019		4,693,290
Balance at Sep. 30, 2019		$ 4,694	101,486,119	(87,971,998)	13,518,815
Balance (in shares) at Jun. 30, 2019		4,693,290
Balance at Jun. 30, 2019		$ 4,694	101,340,798	(85,167,906)	16,177,586
Stock-based compensation expense			145,321		145,321
Net loss				(2,804,092)	(2,804,092)
Balance (in shares) at Sep. 30, 2019		4,693,290
Balance at Sep. 30, 2019		$ 4,694	$ 101,486,119	$ (87,971,998)	$ 13,518,815