Note 8 - Income Taxes: Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Details
Property and equipment, principally due to differences in depreciation	$ (643)	$ (722)
Inventory reserves and other inventory-related temporary basis differences	614	696
Warranty, vacation, deferred rent and other liabilities	687	883
Retirement liabilities	1,032	1,088
Net operating loss carryforwards	62,484	62,194
Credit carryforwards	36	817
Other	1,037	1,227
Total deferred income tax assets	65,247	66,183
Less valuation allowance	(65,247)	(66,183)
Net deferred income tax assets	$ 0	$ 0