Statement of Stockholders' Equity - USD ($)	Common stock [Member]	Paid-in Capital [Member]	Accumulated Deficit [Member]	Total
Balance at Dec. 31, 2018	$ 586,200	$ 12,440,000	$ (11,059,500)	$ 1,966,700
Balance, shares at Dec. 31, 2018	58,616,716			58,616,716
Issuance of common stock	$ 7,100	18,300		$ 25,400
Issuance of common stock shares	720,000
Conversion of debentures and accrued interest to common stock	$ 17,100	25,600		42,700
Conversion of debentures and accrued interest to common stock shares	1,707,982
Net income			754,900	754,900
Balance at Dec. 31, 2019	$ 610,400	12,483,900	(10,304,600)	$ 2,789,700
Balance, shares at Dec. 31, 2019	61,044,698			61,044,698
Conversion of debentures and accrued interest to common stock	$ 57,600	86,400		$ 144,000
Conversion of debentures and accrued interest to common stock shares	5,758,992
Exercise of warrants	$ 5,500	5,500		11,000
Exercise of warrants, shares	550,000
Net income			508,400	508,400
Balance at Dec. 31, 2020	$ 673,500	$ 12,575,800	$ (9,796,200)	$ 3,453,100
Balance, shares at Dec. 31, 2020	67,353,690			67,353,690