Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Deferred Compensation, Share-Based Payments [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2020	26,260,776
Balance at Dec. 31, 2020	$ 194,692	$ 89,659,433	$ (2,165,721)	$ (5,926,872)	$ (65,058,171)	$ 16,703,361
Issuance of common stock under equity incentive plan (in shares)	51,000
Issuance of common stock under equity incentive plan	$ 51	120,484	0	0	0	120,535
Warrant compensation costs	0	8,985	0	0	0	8,985
Deferred compensation amortization				249,801		249,801
Purchase of treasury stock costs	0	0	(49,454)	0	0	(49,454)
Net (loss)	$ 0	0	0	0	(720,252)	(720,252)
Cashless warrant exercise (in shares)	19,795
Cashless warrant exercise	$ 19	(19)
Reversal of deferred compensation amortization that did not vest (in shares)	(17,111)
Reversal of deferred compensation amortization that did not vest	$ (17)	(48,599)		5,994		(42,622)
Balance (in shares) at Mar. 31, 2021	26,314,460
Balance at Mar. 31, 2021	$ 194,745	89,740,284	(2,215,175)	(5,671,077)	(65,778,423)	16,270,354
Balance (in shares) at Dec. 31, 2021	26,807,145
Balance at Dec. 31, 2021	$ 195,235	93,100,129	(2,404,458)	(6,842,195)	(65,379,805)	18,668,906
Issuance of common stock under equity incentive plan (in shares)	61,600
Issuance of common stock under equity incentive plan	$ 62	267,856	0	(12,330)	0	255,588
Warrant compensation costs	0	8,985	0	0	0	8,985
Deferred compensation amortization				295,092		295,092
Purchase of treasury stock costs	0	0	(66,494)	0	0	(66,494)
Net (loss)	$ 0	0	0	0	(1,622,270)	(1,622,270)
Balance (in shares) at Mar. 31, 2022	26,868,745
Balance at Mar. 31, 2022	$ 195,297	$ 93,376,970	$ (2,470,952)	$ (6,559,433)	$ (67,002,075)	$ 17,539,807