Consolidated Statements of Changes in Shareholders' Equity - USD ($)	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Deficit	Total
Stockholders' Equity Attributable to Parent, Beginning Balance at Dec. 31, 2017	$ 39,265	$ 11,532,207	$ (2,966,798)	$ (3,536,186)	$ 5,068,488
Shares, Outstanding, Beginning Balance at Dec. 31, 2017	3,926,491		1,087,217
Share-based compensation		56,168			56,168
Issuance of common stock from treasury, shares			(21,734)
Issuance of common stock from treasury		16,442	$ 59,308		75,750
Net income (loss)				(1,098,307)	(1,098,307)
Stockholders' Equity Attributable to Parent, Ending Balance at Dec. 31, 2018	$ 39,265	11,604,817	$ (2,907,490)	(4,648,484)	4,088,108
Shares, Outstanding, Ending Balance at Dec. 31, 2018	3,926,491		1,065,483
Change in accounting principle - ASC 606				(13,991)	(13,991)
Share-based compensation		108,716			$ 108,716
Issuance of common stock from treasury, shares			(45,601)		0
Issuance of common stock from treasury		(13,894)	$ 124,435		$ 110,541
Issuance of warrants		35,818			35,818
Net income (loss)				(2,141,134)	(2,141,134)
Stockholders' Equity Attributable to Parent, Ending Balance at Dec. 31, 2019	$ 39,265	$ 11,735,457	$ (2,783,055)	$ (6,789,618)	$ 2,202,049
Shares, Outstanding, Ending Balance at Dec. 31, 2019	3,926,491		1,019,882