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, 2017	Dec. 31, 2016
Details
Allowance for Doubtful Accounts Receivable, Beginning Balance	$ 259	$ 286
Write-off of accounts receivable	(7)	(47)
Increase (reduction) in estimated losses on accounts receivable	(143)	20
Allowance for Doubtful Accounts Receivable, Ending Balance	$ 109	$ 259