6. Loans and Allowance For Loan Losses: Schedule of Age Analysis of Allowance for Loan Losses (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Beginning balance	$ 252,000	$ 355,000	$ 300,000	$ 418,000
Provision (credit) for loan losses	(15,000)	45,000	91,000	(50,000)
Charge-offs	(1,000)	(1,000)	(4,000)	(67,000)
Recoveries	3,000	8,000	34,000	16,000
Net (charge-offs) recoveries	2,000	7,000	30,000	(51,000)
Ending balance	239,000	317,000	239,000	317,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	70,000		70,000		$ 54,000
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	169,000		169,000		246,000
Period-end amount allocated to: Total	239,455		239,455		300,428
Loans, ending balance: Loans individually evaluated for impairment	2,038,000		2,038,000		2,083,000
Loans, ending balance: Loans collectively evaluated for impairment	21,322,000		21,322,000		24,752,000
Loans and Leases Receivable, Net of Deferred Income	25,530,066		25,530,066		26,835,035
Commercial And Industrial
Beginning balance	74,000	87,000	68,000	151,000
Provision (credit) for loan losses	(65,000)	41,000	61,000	(25,000)
Charge-offs	0	0	0	0
Recoveries	1,000	1,000	3,000	3,000
Net (charge-offs) recoveries	1,000	1,000	3,000	3,000
Ending balance	10,000	129,000	10,000	129,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0		0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	10,000		10,000		68,000
Period-end amount allocated to: Total	10,000		10,000		68,000
Loans, ending balance: Loans individually evaluated for impairment	319,000		319,000		352,000
Loans, ending balance: Loans collectively evaluated for impairment	1,972,000		1,972,000		1,797,000
Loans and Leases Receivable, Net of Deferred Income	2,291,000		2,291,000		2,149,000
Commercial Real Estate Portfolio Segment
Beginning balance	170,000	245,000	179,000	250,000
Provision (credit) for loan losses	18,000	75,000	16,000	(39,000)
Charge-offs	0	(1,000)	0	(42,000)
Recoveries	2,000	0	27,000	0
Net (charge-offs) recoveries	2,000	1,000	27,000	(42,000)
Ending balance	190,000	169,000	190,000	169,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	70,000		70,000		54,000
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	120,000		120,000		125,000
Period-end amount allocated to: Total	197,000		197,000		179,000
Loans, ending balance: Loans individually evaluated for impairment	1,719,000		1,719,000		1,731,000
Loans, ending balance: Loans collectively evaluated for impairment	18,872,000		18,872,000		19,757,000
Loans and Leases Receivable, Net of Deferred Income	20,591,000		20,591,000		21,488,000
Consumer Real Estate
Beginning balance	8,000	13,000	10,000	8,000
Provision (credit) for loan losses	0	11,000	3,000	14,000
Charge-offs	0	0	0	(22,000)
Recoveries	0	6,000	1,000	8,000
Net (charge-offs) recoveries	0	6,000	1,000	(14,000)
Ending balance	8,000	8,000	8,000	8,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0		0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	8,000		8,000		10,000
Period-end amount allocated to: Total	8,000		8,000		10,000
Loans, ending balance: Loans individually evaluated for impairment	0		0		0
Loans, ending balance: Loans collectively evaluated for impairment	1,841,000		1,841,000		2,232,000
Loans and Leases Receivable, Net of Deferred Income	1,841,000		1,841,000		2,232,000
Consumer And Other Loans
Beginning balance	10,000	10,000	11,000	9,000
Provision (credit) for loan losses	0	0	1,000	0
Charge-offs	(1,000)	0	(4,000)	(3,000)
Recoveries	0	1,000	3,000	5,000
Net (charge-offs) recoveries	(1,000)	1,000	1,000	2,000
Ending balance	9,000	11,000	9,000	11,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0		0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	9,000		9,000		11,000
Period-end amount allocated to: Total	9,000		9,000		11,000
Loans, ending balance: Loans individually evaluated for impairment	0		0		0
Loans, ending balance: Loans collectively evaluated for impairment	807,000		807,000		966,000
Loans and Leases Receivable, Net of Deferred Income	807,000		807,000		966,000
Unallocated
Beginning balance	(10,000)	0	32,000
Provision (credit) for loan losses	32,000	0	10,000
Charge-offs	0	0	0
Recoveries	0	0	0
Net (charge-offs) recoveries	0	0	0
Ending balance	22,000	$ 0	22,000	$ 0
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0		0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	22,000		22,000		32,000
Period-end amount allocated to: Total	22,000		22,000		32,000
Loans, ending balance: Loans individually evaluated for impairment	0		0		0
Loans, ending balance: Loans collectively evaluated for impairment	0		0		0
Loans and Leases Receivable, Net of Deferred Income	$ 0		$ 0		$ 0