CONDENSED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Total
Balance at Dec. 31, 2019	$ 107,224	$ 29,705,673	$ (27,118,678)	$ 2,694,219
Balance (in shares) at Dec. 31, 2019	10,722,401
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	111,655	111,655
Stock-based compensation	0	42,266	0	42,266
Balance at Sep. 30, 2020	$ 107,224	29,747,939	(27,007,023)	2,848,140
Balance (in shares) at Sep. 30, 2020	10,722,401
Balance at Jun. 30, 2020	$ 107,224	29,736,129	(27,288,105)	2,555,248
Balance (in shares) at Jun. 30, 2020	10,722,401
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	281,082	281,082
Stock-based compensation	0	11,810	0	11,810
Balance at Sep. 30, 2020	$ 107,224	29,747,939	(27,007,023)	2,848,140
Balance (in shares) at Sep. 30, 2020	10,722,401
Balance at Dec. 31, 2020	$ 107,224	29,760,533	(27,166,106)	$ 2,701,651
Balance (in shares) at Dec. 31, 2020	10,722,401			10,722,401
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	1,005,774	$ 1,005,774
Stock-based compensation	0	45,041	0	45,041
Balance at Sep. 30, 2021	$ 107,224	29,805,574	(26,160,332)	$ 3,752,466
Balance (in shares) at Sep. 30, 2021	10,722,401			10,722,401
Balance at Jun. 30, 2021	$ 107,224	29,786,923	(26,655,684)	$ 3,238,463
Balance (in shares) at Jun. 30, 2021	10,722,401
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	495,352	495,352
Stock-based compensation	0	18,651	0	18,651
Balance at Sep. 30, 2021	$ 107,224	$ 29,805,574	$ (26,160,332)	$ 3,752,466
Balance (in shares) at Sep. 30, 2021	10,722,401			10,722,401