Note 1 - Nature of Operations and Summary of Significant Accounting Policies: Trade Accounts Receivable: Schedule of Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Text Block [Abstract]
Allowance for Doubtful Accounts Receivable, Beginning Balance	$ 109	$ 259
Write-off of accounts receivable	0	(7)
Increase (reduction) in estimated losses on accounts receivable	48	(143)
Allowance for Doubtful Accounts Receivable, Ending Balance	$ 157	$ 109