Statements of Stockholders' Equity (unaudited) - USD ($)		Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Beginning balance, value at Dec. 31, 2020		$ 67,400	$ 13,181,900	$ (9,796,200)	$ 3,453,100
Beginning balance, shares at Dec. 31, 2020	[1]	6,737,041
Net income				114,800	114,800
Ending balance, value at Mar. 31, 2021		$ 67,400	13,181,900	(9,681,400)	3,567,900
Ending balance, shares at Mar. 31, 2021	[1]	6,737,041
Exercise of warrants		$ 100	2,700		2,800
Exercise of warrants, shares	[1]	14,137
Net income				42,500	42,500
Ending balance, value at Jun. 30, 2021		$ 67,500	13,184,600	(9,638,900)	3,613,200
Ending balance, shares at Jun. 30, 2021	[1]	6,751,178
Net income				1,100	1,100
Ending balance, value at Sep. 30, 2021		$ 67,500	13,184,600	(9,637,800)	3,614,300
Ending balance, shares at Sep. 30, 2021	[1]	6,751,178
Beginning balance, value at Dec. 31, 2021		$ 67,500	13,184,600	(9,746,800)	3,505,300
Beginning balance, shares at Dec. 31, 2021	[1]	6,751,178
Net income				(203,400)	(203,400)
Ending balance, value at Mar. 31, 2022		$ 67,500	13,184,600	(9,950,200)	3,301,900
Ending balance, shares at Mar. 31, 2022	[1]	6,751,178
Net income				(297,000)	(297,500)
Ending balance, value at Jun. 30, 2022		$ 67,500	13,184,600	(10,247,200)	3,004,900
Ending balance, shares at Jun. 30, 2022	[1]	6,751,178
Sales of common stock		$ 25,000	3,475,000		3,500,000
Sales of common stock, shares	[1]	2,500,000
Net income				206,500	206,500
Ending balance, value at Sep. 30, 2022		$ 92,500	$ 16,659,600	$ (10,040,700)	$ 6,711,400
Ending balance, shares at Sep. 30, 2022	[1]	9,251,178

[1] Reflects the 1-for-10 reverse stock split that became effective on September 2, 2022. See Note 5.