17. Summary of Quarterly Results (unaudited): Schedule of Condensed Income Statement (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
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Interest income	$ 651,000	$ 674,000	$ 583,000	$ 633,000	$ 614,000	$ 642,000	$ 737,000	$ 593,000	$ 2,540,511	$ 2,587,393
Interest expense	20,000	19,000	16,000	17,000	17,000	17,000	16,000	16,000	71,681	65,972
Net interest income	631,000	655,000	567,000	616,000	597,000	625,000	721,000	577,000	2,468,830	2,521,421
Provision (credit) for loan losses	9,000	(15,000)	(46,000)	(30,000)	(19,000)	(45,000)	30,000	(35,000)	(82,000)	(69,000)
Net interest after provision (credit) for loan losses	622,000	670,000	613,000	646,000	616,000	670,000	691,000	612,000	2,550,830	2,590,421
Noninterest income	453,000	490,000	307,000	241,000	538,000	392,000	705,000	288,000	1,491,296	1,922,858
Noninterest expense	1,105,000	1,131,000	1,035,000	1,090,000	1,146,000	1,162,000	1,080,000	1,099,000	4,361,552	4,488,742
Net (loss) income	$ (30,000)	$ 29,000	$ (115,000)	$ (203,000)	$ 8,000	$ (100,000)	$ 316,000	$ (199,000)	$ (319,426)	$ 24,537
Basic (loss) income per common share	$ (0.03)	$ 0.03	$ (0.14)	$ (0.25)	$ 0.01	$ (0.12)	$ 0.38	$ (0.24)	$ (0.39)	$ 0.03
Diluted (loss) income per common share	$ (0.03)	$ 0.03	$ (0.14)	$ (0.25)	$ 0.01	$ (0.12)	$ 0.38	$ (0.24)	$ (0.39)	$ 0.03