Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)	Common Stock [Member]	Treasury Stock, Common [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2021	40,482,659	(12,253,502)
Balance at Dec. 31, 2021	$ 40,483	$ (18,929,915)	$ 101,026,496	$ (63,746,602)	$ 18,390,462
Stock-based compensation expense	0	0	453,791	0	453,791
Net loss	$ 0	$ 0	0	(2,491,665)	(2,491,665)
Issuance of common stock upon exercise of stock options (in shares)	35,000	0
Issuance of common stock upon exercise of stock options	$ 35	$ 0	42,315	0	42,350
Balance (in shares) at Mar. 31, 2022	40,517,659	(12,253,502)
Balance at Mar. 31, 2022	$ 40,518	$ (18,929,915)	101,522,602	(66,238,267)	16,394,938
Balance (in shares) at Dec. 31, 2022	40,816,602	(12,253,502)
Balance at Dec. 31, 2022	$ 40,817	$ (18,929,915)	103,458,697	(73,481,860)	11,087,739
Stock-based compensation expense	$ 0	$ 0	330,639	0	330,639
Issuance of common stock upon vesting of restricted stock units (in shares)	247,961	0
Issuance of common stock upon vesting of restricted stock units	$ 248	$ 0	341,938	0	342,186
Net loss	$ 0	$ 0	0	(956,444)	$ (956,444)
Issuance of common stock upon exercise of stock options (in shares)					(0)
Balance (in shares) at Mar. 31, 2023	41,064,563	(12,253,502)
Balance at Mar. 31, 2023	$ 41,065	$ (18,929,915)	$ 104,131,274	$ (74,438,304)	$ 10,804,120