Note 8 - Income Taxes: Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Details
Deferred Tax Assets, Inventory	$ 56	$ 98
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts	16	25
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities	89	147
Deferred Tax Assets, Other	4	(23)
Deferred Tax Liabilities Depreciation and Amortization	(3,789)	(4,277)
Unrealized investment loss	66	105
Deferred Tax Assets, Net	$ (3,558)	$ (3,925)