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, 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
Translation adjustment				259,099	259,099		259,099
Dividends paid			(1,274,753)		(1,274,753)		(1,274,753)
Net income			786,894		786,894	1,580,901	2,367,795
Common shares issued upon exercise of stock options	$ 207	550,753			550,960		$ 550,960
Common shares issued upon exercise of stock options, shares	206,966						212,000
Distributions to noncontrolling interests						(991,708)	$ (991,708)
Stock-based compensation		555,267			555,267		555,267
Balance at Dec. 31, 2025	$ 12,723	$ 19,895,935	$ 19,348,668	$ (347,887)	$ 38,909,439	$ 3,923,247	$ 42,832,686
Balance, shares at Dec. 31, 2025	12,722,498