Statements of Stockholders' Equity - USD ($)	Common Stock Outstanding [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock, Common [Member]	Total
Balance (in shares) at Dec. 31, 2021	4,521,988
Balance at Dec. 31, 2021	$ 4,522	$ 1,988,137	$ 4,768,298	$ (233,599)	$ 6,527,358
Stock compensation expense (in shares)	100,000
Stock compensation expense	$ 100	218,893	0	0	218,993
Cash dividend	0	0	(95,112)	0	(95,112)
Net income (loss)	$ 0	0	1,624,453	0	$ 1,624,453
Exercise of employee stock options (in shares)					0
Balance (in shares) at Dec. 31, 2022	4,621,988
Balance at Dec. 31, 2022	$ 4,622	2,207,030	6,297,639	(233,599)	$ 8,275,692
Stock compensation expense (in shares)	0
Stock compensation expense	$ 0	139,226	0	0	139,226
Cash dividend	0	0	(138,989)	0	(138,989)
Net income (loss)	$ 0	0	1,613,005	0	$ 1,613,005
Exercise of employee stock options (in shares)	1,000				1,000
Exercise of employee stock options	$ 1	2,019	0	990	$ 3,010
Stock issued to employees from treasury (in shares)	10,000
Stock issued to employees from treasury	$ 10	(7,552)		7,542	0
Stock issued for service from treasury (in shares)	1,877
Stock issued for service from treasury	$ 2	5,760	0	1,859	7,621
Balance (in shares) at Dec. 31, 2023	4,634,865
Balance at Dec. 31, 2023	$ 4,635	$ 2,346,483	$ 7,771,655	$ (223,208)	$ 9,899,565