6. Other Real Estate Owned: Schedule of Change in Other Real Estate Owned (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Text Block [Abstract]
Other Real Estate, Beginning Balance	$ 447,371	$ 480,000
Additions, transfers from loans	184,000	0
Sales	0	(33,000)
Other Real Estate, Period Increase (Decrease)	631,000	447,000
Less: write-downs	(5,000)	0
Other Real Estate, Ending Balance	$ 626,071	$ 447,371