Note 7 - Income Taxes: Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Details
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	$ 2,346	$ 2,620	$ 2,520
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	439	490	448
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount	951	1,129	1,010
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount	(3)	(3)	(6)
Interest Income, Securities, Operating, Tax Exempt	(195)	0	0
Adjustment To Deferred Tax Liability	0	0	391
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	(84)	(50)	(90)
Provision for income taxes (note 7)	$ 3,454	$ 4,186	$ 4,273