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
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 dividends			(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
Stock-based compensation expense			324,667		324,667
Net loss				(3,313,961)	(3,313,961)
Balance (in shares) at Mar. 31, 2018		3,368,438
Balance at Mar. 31, 2018		$ 3,369	94,585,965	(64,868,850)	29,720,484
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
Series A cumulative preferred dividends
Stock-based compensation expense			91,204		91,204
Net loss				(2,747,809)	(2,747,809)
Balance (in shares) at Mar. 31, 2019		3,376,230
Balance at Mar. 31, 2019		$ 3,377	$ 95,624,085	$ (82,672,508)	$ 12,954,954