Statements of Stockholders' Equity - USD ($)	Common Stock Outstanding [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Total
Balance (in shares) at Dec. 31, 2019	4,506,788
BALANCE at Dec. 31, 2019	$ 4,507	$ 1,847,594	$ 2,750,754	$ (245,631)	$ 4,357,224
Stock compensation expense	0	29,376	0	0	29,376
Net income (loss)	$ 0	0	306,893	0	306,893
BALANCE (in shares) at Dec. 31, 2020	4,506,788
BALANCE at Dec. 31, 2020	$ 4,507	1,876,970	3,057,647	(245,631)	4,693,493
Stock compensation expense	0	123,214	0	0	123,214
Net income (loss)	$ 0	0	1,710,651	0	1,710,651
Stock issued to employees from treasury (in shares)	15,200
Stock issued to employees from treasury	$ 15	(12,047)	0	12,032	0
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