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	0	0	0	249,801	0	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)
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)	0	5,994	0	(42,622)
Cashless warrant exercise (in shares)	19,795
Cashless warrant exercise	$ 19	(19)
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, 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
Net (loss)						(501,769)
Balance (in shares) at Jun. 30, 2021	26,261,016
Balance at Jun. 30, 2021	$ 194,691	89,662,665	(2,244,985)	(5,267,134)	(65,559,940)	16,785,297
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
Issuance of common stock under equity incentive plan (in shares)	61,556
Issuance of common stock under equity incentive plan	$ 61	150,481	0	0	0	150,542
Warrant compensation costs	0	8,985	0	0	0	8,985
Deferred compensation amortization	0	0	0	245,847	0	245,847
Purchase of treasury stock costs	0	0	(29,810)	0	0	(29,810)
Net (loss)	$ 0	0	0	0	218,483	218,483
Reversal of deferred compensation amortization that did not vest (in shares)	(115,000)
Reversal of deferred compensation amortization that did not vest	$ (115)	(237,085)	0	158,096	0	(79,104)
Balance (in shares) at Jun. 30, 2021	26,261,016
Balance at Jun. 30, 2021	$ 194,691	89,662,665	(2,244,985)	(5,267,134)	(65,559,940)	16,785,297
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
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
Net (loss)						(3,562,615)
Balance (in shares) at Jun. 30, 2022	26,837,978
Balance at Jun. 30, 2022	$ 195,264	93,468,126	(2,951,047)	(6,167,870)	(68,942,420)	15,602,052
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
Issuance of common stock under equity incentive plan (in shares)	54,233
Issuance of common stock under equity incentive plan	$ 52	258,636	0	0	0	258,687
Warrant compensation costs	0	8,985	0	0	0	8,985
Deferred compensation amortization				293,942		293,942
Purchase of treasury stock costs	0	0	(480,095)	0	0	(480,095)
Net (loss)	$ 0	0	0	0	(1,940,345)	(1,940,345)
Reversal of deferred compensation amortization that did not vest (in shares)	(85,000)
Reversal of deferred compensation amortization that did not vest	$ (85)	(176,465)		97,621		(78,929)
Balance (in shares) at Jun. 30, 2022	26,837,978
Balance at Jun. 30, 2022	$ 195,264	$ 93,468,126	$ (2,951,047)	$ (6,167,870)	$ (68,942,420)	$ 15,602,052