Note 9 - Income Taxes: Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Details
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	$ 2,127	$ 3,086	$ 2,998
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	365	299	291
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount	1,607	1,444	1,270
Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Amount	(146)	(303)	(287)
Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of 2017 Transition Tax On Accumulated Foreign Earnings Amount	(3,230)	6,288	0
Tax Cuts And Jobs Act Of 2017 Incomplete Accounting Change In Tax Rate Provision	0	(230)	0
Tax Cuts and Jobs Act of 2017 Global Intangible Low Taxed Income Income Tax Expense	179	0	0
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	2	(7)	22
Provision for income taxes	$ 904	$ 10,577	$ 4,294