Consolidated Statements of Stockholders' Equity - USD ($)	Common Stock [Member]	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2022	$ 12,426	$ 17,523,345	$ 15,903,964	$ (805,799)	$ 32,633,936	$ 2,605,034	$ 35,238,970
Balance, shares at Dec. 31, 2022	12,426,260
Translation adjustment				10,653	10,653		10,653
Dividends paid			(626,777)		(626,777)		(626,777)
Non-controlling interest of 317 Mendota LLC						200,000	200,000
Net income			2,775,864		2,775,864	980,121	3,755,985
Common shares issued upon exercise of stock options	$ 10	13,590			13,600		$ 13,600
Common shares issued upon exercise of stock options, shares	9,272						8,000
Distributions to noncontrolling interests						(719,439)	$ (719,439)
Stock-based compensation		395,080			395,080		395,080
Balance at Dec. 31, 2023	$ 12,436	17,932,015	18,053,051	(795,146)	35,202,356	3,065,716	38,268,072
Balance, shares at Dec. 31, 2023	12,435,532
Translation adjustment				188,160	188,160		188,160
Dividends paid			(1,255,053)		(1,255,053)		(1,255,053)
Net income			3,038,529		3,038,529	1,063,060	4,101,589
Common shares issued upon exercise of stock options	$ 80	184,770			184,850		$ 184,850
Common shares issued upon exercise of stock options, shares	80,000						80,000
Distributions to noncontrolling interests						(794,722)	$ (794,722)
Stock-based compensation		673,130			673,130		673,130
Balance at Dec. 31, 2024	$ 12,516	$ 18,789,915	$ 19,836,527	$ (606,986)	$ 38,031,972	$ 3,334,054	$ 41,366,026
Balance, shares at Dec. 31, 2024	12,515,532