Note 4 - Fair Value Measurements and Financial Instruments: Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Measurements, Recurring
Equity, Fair Value Disclosure	$ 80	$ 64
Fair Value, Inputs, Level 1
Equity, Fair Value Disclosure	$ 80	$ 64