Note 7 - Income Taxes: Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Details
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	$ 2,512	$ 2,127	$ 3,086
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	(124)	365	299
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount	985	1,607	1,444
Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Amount	(9)	(146)	(303)
Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of 2017 Transition Tax On Accumulated Foreign Earnings Amount	(266)	(3,230)	6,288
Tax Cuts And Jobs Act Of 2017 Incomplete Accounting Change In Tax Rate Provision	0	0	(230)
Tax Cuts and Jobs Act of 2017 Global Intangible Low Taxed Income Income Tax Expense	59	179	0
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	0	2	(7)
Provision for income taxes (note 7)	$ 3,157	$ 904	$ 10,577