Note 6 - Operating Lease: Schedule of lease expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Notes To Financial Statements Abstract
Amortization of right-of-use asset recorded as rent expense	$ 413	$ 540
Interest on lease liability included in other expense	82	33
Total lease cost	$ 495	$ 573