Note 8 - Income Taxes: Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Details
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	$ 3,086	$ 2,998	$ 2,704
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	299	291	262
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount	1,444	1,270	990
Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Amount	(303)	(287)	(257)
Effective Income Tax Rate Reconciliation TaxCuts And Jobs Act Of 2017 Transition Tax On Accumulated Foreign Earnings Amount	6,288
TaxCuts And Jobs Act Of 2017 Incomplete Accounting Change In Tax Rate Provisional Income Tax Expense Benefit	(228)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	(9)	22	3
Provision for income taxes	$ 10,577	$ 4,294	$ 3,702