Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($)	Common Stock [Member]	Deferred Compensation, Share-Based Payments [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Treasury Stock, Common [Member]	Total
Balance (in shares) at Dec. 31, 2023	8,154,474
Balance at Dec. 31, 2023	$ 8,154	$ 84,576	$ 73,505,439	$ 342,968	$ (69,637,742)	$ (164,840)	$ 4,138,679
Balance (in shares) at Dec. 31, 2023						(143,637)
Foreign currency translation adjustments	$ 0	0	0	(45,425)	0	$ 0	(45,425)
Issuance of common stock for accrued bonus (in shares)	54,559					0
Issuance of common stock for accrued bonus	$ 55	(84,576)	84,521	0	0	$ 0	0
Share-based compensation expense	0	0	38,984	0	0	0	38,984
Net income (loss)	$ 0	0	0	0	299,562	$ 0	299,438
Purchase of treasury stock (in shares)	0					(3,996)
Purchase of treasury stock	$ 0	0	0	0	0	$ (3,996)	(3,996)
Balance (in shares) at Mar. 31, 2024	8,209,033
Balance at Mar. 31, 2024	$ 8,209	0	73,628,944	297,543	(69,338,180)	$ (168,836)	4,427,680
Balance (in shares) at Mar. 31, 2024						(147,633)
Balance (in shares) at Dec. 31, 2023	8,154,474
Balance at Dec. 31, 2023	$ 8,154	84,576	73,505,439	342,968	(69,637,742)	$ (164,840)	4,138,679
Balance (in shares) at Dec. 31, 2023						(143,637)
Foreign currency translation adjustments							(61,361)
Net income (loss)							936,335
Balance (in shares) at Sep. 30, 2024	8,209,033
Balance at Sep. 30, 2024	$ 8,209	0	73,634,888	281,606	(68,701,407)	$ (168,836)	5,054,460
Balance (in shares) at Sep. 30, 2024						(147,633)
Balance (in shares) at Mar. 31, 2024	8,209,033
Balance at Mar. 31, 2024	$ 8,209	0	73,628,944	297,543	(69,338,180)	$ (168,836)	4,427,680
Balance (in shares) at Mar. 31, 2024						(147,633)
Foreign currency translation adjustments	0	0	0	(20,151)	0	$ 0	(20,151)
Share-based compensation expense	0	0	2,678	0	0	0	2,678
Net income (loss)	$ 0	0	0	0	770,452	0	770,452
Balance (in shares) at Jun. 30, 2024	8,209,033
Balance at Jun. 30, 2024	$ 8,209	0	73,631,622	277,392	(68,567,728)	$ (168,836)	5,180,659
Balance (in shares) at Jun. 30, 2024						(147,633)
Foreign currency translation adjustments	0	0	0	4,214	0	$ 0	4,214
Share-based compensation expense	0	0	3,266	0	0	0	3,266
Net income (loss)	$ 0	0	0	0	(133,679)	0	(133,679)
Balance (in shares) at Sep. 30, 2024	8,209,033
Balance at Sep. 30, 2024	$ 8,209	0	73,634,888	281,606	(68,701,407)	$ (168,836)	5,054,460
Balance (in shares) at Sep. 30, 2024						(147,633)
Balance (in shares) at Dec. 31, 2024	8,213,533
Balance at Dec. 31, 2024	$ 8,214	193,246	73,640,538	226,031	(68,874,026)	$ (168,836)	$ 5,025,167
Balance (in shares) at Dec. 31, 2024						(147,633)	147,633
Foreign currency translation adjustments	$ 0	0	0	(47,281)	0	$ 0	$ (47,281)
Issuance of common stock for accrued bonus (in shares)	62,501					0
Issuance of common stock for accrued bonus	$ 62	(193,246)	193,184	0	0	$ 0	0
Issuance of commons stock for stock options exercises (in shares)	1,433					0
Issuance of commons stock for stock options exercises	$ 2	0	2,210	0	0	$ 0	2,212
Share-based compensation expense	0	0	1,267	0	0	0	1,267
Net income (loss)	$ 0	0	0	0	(148,773)	0	(148,773)
Balance (in shares) at Mar. 31, 2025	8,277,467
Balance at Mar. 31, 2025	$ 8,278	0	73,837,199	178,750	(69,022,799)	$ (168,836)	4,832,592
Balance (in shares) at Mar. 31, 2025						(147,633)
Balance (in shares) at Dec. 31, 2024	8,213,533
Balance at Dec. 31, 2024	$ 8,214	193,246	73,640,538	226,031	(68,874,026)	$ (168,836)	$ 5,025,167
Balance (in shares) at Dec. 31, 2024						(147,633)	147,633
Foreign currency translation adjustments							$ 5,785
Net income (loss)							(513,965)
Balance (in shares) at Sep. 30, 2025	8,527,467
Balance at Sep. 30, 2025	$ 8,528	0	74,459,746	231,816	(69,387,992)	$ (168,836)	$ 5,143,262
Balance (in shares) at Sep. 30, 2025						(147,633)	147,633
Balance (in shares) at Mar. 31, 2025	8,277,467
Balance at Mar. 31, 2025	$ 8,278	0	73,837,199	178,750	(69,022,799)	$ (168,836)	$ 4,832,592
Balance (in shares) at Mar. 31, 2025						(147,633)
Foreign currency translation adjustments	0	0	0	65,195	0	$ 0	65,195
Share-based compensation expense	0	0	136,872	0	0	0	136,872
Net income (loss)	$ 0	0	0	0	(397,349)	$ 0	(397,349)
Issuance of common stock for signing bonus (in shares)	250,000					0
Issuance of common stock for signing bonus	$ 250		373,500	0	0	$ 0	373,750
Balance (in shares) at Jun. 30, 2025	8,527,467
Balance at Jun. 30, 2025	$ 8,528	0	74,347,571	243,945	(69,420,148)	$ (168,836)	5,011,060
Balance (in shares) at Jun. 30, 2025						(147,633)
Foreign currency translation adjustments	0	0	0	(12,129)	0	$ 0	(12,129)
Share-based compensation expense	0	0	112,175	0	0	0	112,175
Net income (loss)	$ 0	0	0	0	32,156	0	32,156
Balance (in shares) at Sep. 30, 2025	8,527,467
Balance at Sep. 30, 2025	$ 8,528	$ 0	$ 74,459,746	$ 231,816	$ (69,387,992)	$ (168,836)	$ 5,143,262
Balance (in shares) at Sep. 30, 2025						(147,633)	147,633