Note 8 - Income Taxes: Schedule of Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Details
Property and equipment, principally due to differences in depreciation	$ 71
Property and equipment, principally due to differences in depreciation		$ (643)
Inventory reserves and other inventory-related temporary basis differences	361	614
Warranty, vacation, deferred rent and other liabilities	371	687
Retirement liabilities	645	1,032
Net operating loss carryforwards	38,536	62,484
Credit carryforwards	27	36
Other	143	1,037
Total deferred income tax assets	40,154	65,247
Less valuation allowance	(40,154)	(65,247)
Net deferred income tax assets	$ 0	$ 0