4. Loans and Allowance For Loan Losses: Schedule of Age Analysis of Allowance for Loan Losses (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Beginning balance	$ 300,000	$ 418,000
Provision for loan losses	(82,000)	(69,000)
Charge-offs	(75,000)	(68,000)
Recoveries	37,000	19,000
Net charge-offs	(38,000)	(49,000)
Ending balance	180,000	300,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	54,000
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	180,000	246,000
Period-end amount allocated to: Total	179,949	300,428
Loans, ending balance: Loans individually evaluated for impairment	1,277,000	2,083,000
Loans, ending balance: Loans collectively evaluated for impairment	24,448,000	24,752,000
Loans and Leases Receivable, Net of Deferred Income	25,725,700	26,835,035
Commercial And Industrial
Beginning balance	68,000	151,000
Provision for loan losses	(65,000)	(87,000)
Charge-offs	0	0
Recoveries	4,000	4,000
Net charge-offs	4,000	4,000
Ending balance	7,000	68,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	7,000	68,000
Period-end amount allocated to: Total	7,000	68,000
Loans, ending balance: Loans individually evaluated for impairment	76,000	352,000
Loans, ending balance: Loans collectively evaluated for impairment	1,722,000	1,797,000
Loans and Leases Receivable, Net of Deferred Income	1,798,000	2,149,000
Commercial Real Estate Portfolio Segment
Beginning balance	179,000	250,000
Provision for loan losses	28,000	(30,000)
Charge-offs	(52,000)	(41,000)
Recoveries	0	0
Net charge-offs	(52,000)	(41,000)
Ending balance	155,000	179,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	54,000
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	155,000	125,000
Period-end amount allocated to: Total	155,000	179,000
Loans, ending balance: Loans individually evaluated for impairment	1,201,000	1,731,000
Loans, ending balance: Loans collectively evaluated for impairment	20,188,000	19,757,000
Loans and Leases Receivable, Net of Deferred Income	21,389,000	21,488,000
Consumer Real Estate
Beginning balance	10,000	8,000
Provision for loan losses	(10,000)	15,000
Charge-offs	(18,000)	(22,000)
Recoveries	28,000	9,000
Net charge-offs	10,000	(13,000)
Ending balance	10,000	10,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	10,000	10,000
Period-end amount allocated to: Total	10,000	10,000
Loans, ending balance: Loans individually evaluated for impairment	0	0
Loans, ending balance: Loans collectively evaluated for impairment	1,729,000	2,232,000
Loans and Leases Receivable, Net of Deferred Income	1,729,000	2,232,000
Consumer And Other Loans
Beginning balance	11,000	9,000
Provision for loan losses	(3,000)	1,000
Charge-offs	(5,000)	(5,000)
Recoveries	5,000	6,000
Net charge-offs	0	1,000
Ending balance	8,000	11,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	8,000	11,000
Period-end amount allocated to: Total	8,000	11,000
Loans, ending balance: Loans individually evaluated for impairment	0	0
Loans, ending balance: Loans collectively evaluated for impairment	809,000	966,000
Loans and Leases Receivable, Net of Deferred Income	809,000	966,000
Unallocated
Beginning balance	32,000	0
Provision for loan losses	(32,000)	32,000
Charge-offs	0	0
Recoveries	0	0
Net charge-offs	0	0
Ending balance	0	32,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	0	32,000
Period-end amount allocated to: Total	0	32,000
Loans, ending balance: Loans individually evaluated for impairment	0	0
Loans, ending balance: Loans collectively evaluated for impairment	0
Loans and Leases Receivable, Net of Deferred Income	$ 0	$ 0