Note 5 - Fair Value Measurements and Financial Instruments: Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Measurements, Recurring
Equity, Fair Value Disclosure	$ 0	$ 80
Fair Value, Inputs, Level 1
Equity, Fair Value Disclosure	$ 0	$ 80