4. Loans and Allowance For Loan Losses: Schedule of Age Analysis of Past Due Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Nonaccrual	$ 1,616	$ 2,087
Past Due Loans	2,192	2,952
Current Loans	23,533	23,883
Loans and Leases Receivable, Gross	25,725	26,835
Financing Receivables 30 To 89 Days Past Due
Past Due Loans	190	234
Financing Receivables, Equal to Greater than 90 Days Past Due
Past Due Loans	387	631
Commercial And Industrial
Nonaccrual	76	108
Past Due Loans	76	378
Current Loans	1,722	1,771
Loans and Leases Receivable, Gross	1,798	2,149
Commercial And Industrial | Financing Receivables 30 To 89 Days Past Due
Past Due Loans	0	27
Commercial And Industrial | Financing Receivables, Equal to Greater than 90 Days Past Due
Past Due Loans	0	243
Commercial Real Estate Portfolio Segment
Nonaccrual	1,203	1,559
Past Due Loans	1,461	1,842
Current Loans	19,928	19,646
Loans and Leases Receivable, Gross	21,389	21,488
Commercial Real Estate Portfolio Segment | Financing Receivables 30 To 89 Days Past Due
Past Due Loans	50	110
Commercial Real Estate Portfolio Segment | Financing Receivables, Equal to Greater than 90 Days Past Due
Past Due Loans	208	173
Consumer Real Estate
Nonaccrual	337	420
Past Due Loans	561	632
Current Loans	1,168	1,600
Loans and Leases Receivable, Gross	1,729	2,232
Consumer Real Estate | Financing Receivables 30 To 89 Days Past Due
Past Due Loans	102	59
Consumer Real Estate | Financing Receivables, Equal to Greater than 90 Days Past Due
Past Due Loans	123	153
Consumer Real Estate | Home Equity Line of Credit
Nonaccrual	0	0
Past Due Loans	0	0
Current Loans	17	19
Loans and Leases Receivable, Gross	17	19
Consumer Real Estate | Home Equity Line of Credit | Financing Receivables 30 To 89 Days Past Due
Past Due Loans	0	0
Consumer Real Estate | Home Equity Line of Credit | Financing Receivables, Equal to Greater than 90 Days Past Due
Past Due Loans	0	0
Consumer And Other Loans
Nonaccrual	0	0
Past Due Loans	94	100
Current Loans	715	866
Loans and Leases Receivable, Gross	809	966
Consumer And Other Loans | Financing Receivables 30 To 89 Days Past Due
Past Due Loans	38	38
Consumer And Other Loans | Financing Receivables, Equal to Greater than 90 Days Past Due
Past Due Loans	56	62
Commercial | Commercial And Industrial
Nonaccrual	0	33
Past Due Loans	0	33
Current Loans	909	857
Loans and Leases Receivable, Gross	909	890
Commercial | Commercial And Industrial | Financing Receivables 30 To 89 Days Past Due
Past Due Loans	0	0
Commercial | Commercial And Industrial | Financing Receivables, Equal to Greater than 90 Days Past Due
Past Due Loans	0	0
SBA Loans | Commercial And Industrial
Nonaccrual	0	0
Past Due Loans	0	0
Current Loans	19	0
Loans and Leases Receivable, Gross	19	0
SBA Loans | Commercial And Industrial | Financing Receivables 30 To 89 Days Past Due
Past Due Loans	0	0
SBA Loans | Commercial And Industrial | Financing Receivables, Equal to Greater than 90 Days Past Due
Past Due Loans	0	0
SBA Loans | Commercial Real Estate Portfolio Segment
Nonaccrual	81	93
Past Due Loans	81	255
Current Loans	588	0
Loans and Leases Receivable, Gross	669	255
SBA Loans | Commercial Real Estate Portfolio Segment | Financing Receivables 30 To 89 Days Past Due
Past Due Loans	0	0
SBA Loans | Commercial Real Estate Portfolio Segment | Financing Receivables, Equal to Greater than 90 Days Past Due
Past Due Loans	0	162
Asset Based Loans | Commercial And Industrial
Nonaccrual	76	75
Past Due Loans	76	345
Current Loans	794	914
Loans and Leases Receivable, Gross	794	1,259
Asset Based Loans | Commercial And Industrial | Financing Receivables 30 To 89 Days Past Due
Past Due Loans	0	27
Asset Based Loans | Commercial And Industrial | Financing Receivables, Equal to Greater than 90 Days Past Due
Past Due Loans	0	243
Commercial Mortgages | Commercial Real Estate Portfolio Segment
Nonaccrual	935	1,270
Past Due Loans	1,193	1,281
Current Loans	10,478	10,104
Loans and Leases Receivable, Gross	11,671	11,385
Commercial Mortgages | Commercial Real Estate Portfolio Segment | Financing Receivables 30 To 89 Days Past Due
Past Due Loans	50	0
Commercial Mortgages | Commercial Real Estate Portfolio Segment | Financing Receivables, Equal to Greater than 90 Days Past Due
Past Due Loans	208	11
Construction | Commercial Real Estate Portfolio Segment
Nonaccrual	0	0
Past Due Loans	0	0
Current Loans	419	542
Loans and Leases Receivable, Gross	419	542
Construction | Commercial Real Estate Portfolio Segment | Financing Receivables 30 To 89 Days Past Due
Past Due Loans	0	0
Construction | Commercial Real Estate Portfolio Segment | Financing Receivables, Equal to Greater than 90 Days Past Due
Past Due Loans	0	0
Religious Organizations | Commercial Real Estate Portfolio Segment
Nonaccrual	187	196
Past Due Loans	187	306
Current Loans	8,443	9,000
Loans and Leases Receivable, Gross	8,630	9,306
Religious Organizations | Commercial Real Estate Portfolio Segment | Financing Receivables 30 To 89 Days Past Due
Past Due Loans	0	110
Religious Organizations | Commercial Real Estate Portfolio Segment | Financing Receivables, Equal to Greater than 90 Days Past Due
Past Due Loans	0	0
Home Equity Loans | Consumer Real Estate
Nonaccrual	289	345
Past Due Loans	450	498
Current Loans	191	301
Loans and Leases Receivable, Gross	641	799
Home Equity Loans | Consumer Real Estate | Financing Receivables 30 To 89 Days Past Due
Past Due Loans	38	0
Home Equity Loans | Consumer Real Estate | Financing Receivables, Equal to Greater than 90 Days Past Due
Past Due Loans	123	153
Family Residential Mortgage | Consumer Real Estate
Nonaccrual	48	75
Past Due Loans	112	134
Current Loans	959	1,280
Loans and Leases Receivable, Gross	1,071	1,414
Family Residential Mortgage | Consumer Real Estate | Financing Receivables 30 To 89 Days Past Due
Past Due Loans	64	59
Family Residential Mortgage | Consumer Real Estate | Financing Receivables, Equal to Greater than 90 Days Past Due
Past Due Loans	0	0
Student Loans | Consumer And Other Loans
Nonaccrual	0	0
Past Due Loans	87	99
Current Loans	613	756
Loans and Leases Receivable, Gross	700	855
Student Loans | Consumer And Other Loans | Financing Receivables 30 To 89 Days Past Due
Past Due Loans	32	38
Student Loans | Consumer And Other Loans | Financing Receivables, Equal to Greater than 90 Days Past Due
Past Due Loans	55	61
Other | Consumer And Other Loans
Nonaccrual	0	0
Past Due Loans	7	1
Current Loans	102	110
Loans and Leases Receivable, Gross	109	111
Other | Consumer And Other Loans | Financing Receivables 30 To 89 Days Past Due
Past Due Loans	6	0
Other | Consumer And Other Loans | Financing Receivables, Equal to Greater than 90 Days Past Due
Past Due Loans	$ 1	$ 1