Earnings Per Share: Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Details
Net income	$ 1,313	$ 3,140	$ 3,525	$ 3,139	$ 4,452	$ 6,664
Weighted average shares, basic	3,643		3,721		3,675	3,721
Dilutive effect of stock options	16		14		15	16
Diluted shares	3,659		3,735		3,690	3,737
Earnings per share, basic	$ 0.36		$ 0.95		$ 1.21	$ 1.79
Earnings per share, diluted	$ 0.36		$ 0.94		$ 1.21	$ 1.78