Allowance for Loan Losses - Schedule of Allowance for Loan Losses on Basis of Calculation Methodology (Details) - USD ($) $ in Thousands	Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Allowance For Loan Losses On Basis Of Calculation Methodology Abstract
Specifically reserved	$ 1,876		$ 2,781
Historical loss rate	1,688		1,504
Qualitative factors	8,388		7,947
Other	983		545
Total	12,935		12,777		$ 8,669
Unallocated [Member]
Allowance For Loan Losses On Basis Of Calculation Methodology Abstract
Specifically reserved	0		0
Historical loss rate	0		0
Qualitative factors	0		0
Other	983		545
Total	983	[1]	545	[1],[2]	272	[2]
Residential Mortgage Loans [Member] | 1-4 Family First Lien Residential Mortgages [Member]
Allowance For Loan Losses On Basis Of Calculation Methodology Abstract
Specifically reserved	90		205
Historical loss rate	82		88
Qualitative factors	700		638
Total	872		931		580
Residential Mortgage Loans [Member] | Residential Construction Mortgage [Member]
Allowance For Loan Losses On Basis Of Calculation Methodology Abstract
Specifically reserved	0		0
Historical loss rate	0		0
Qualitative factors	0		0
Total	0		0		0
Commercial Loans [Member] | Real Estate [Member]
Allowance For Loan Losses On Basis Of Calculation Methodology Abstract
Specifically reserved	300		231
Historical loss rate	2		80
Qualitative factors	5,006		4,465
Total	5,308		4,776		4,010
Commercial Loans [Member] | Lines of Credit [Member]
Allowance For Loan Losses On Basis Of Calculation Methodology Abstract
Specifically reserved	53		925
Historical loss rate	25		92
Qualitative factors	857		653
Total	935		1,670		1,195
Commercial Loans [Member] | Other Commercial and Industrial [Member]
Allowance For Loan Losses On Basis Of Calculation Methodology Abstract
Specifically reserved	1,319		1,278
Historical loss rate	227		56
Qualitative factors	1,217		1,658
Total	2,762		2,992		1,645
Commercial Loans [Member] | Tax Exempt Loans [Member]
Allowance For Loan Losses On Basis Of Calculation Methodology Abstract
Specifically reserved	0		0
Historical loss rate	0		0
Qualitative factors	3		1
Other	0		0
Total	3		1		1
Consumer Loans [Member] | Home Equity and Junior Liens [Member]
Allowance For Loan Losses On Basis Of Calculation Methodology Abstract
Specifically reserved	114		142
Historical loss rate	324		325
Qualitative factors	336		272
Other	0		0
Total	774		739		553
Consumer Loans [Member] | Other Consumer [Member]
Allowance For Loan Losses On Basis Of Calculation Methodology Abstract
Specifically reserved	0		0
Historical loss rate	1,028		863
Qualitative factors	269		260
Other	0		0
Total	$ 1,297		$ 1,123		$ 413

[1] The ending balance of the loans receivable for the unallocated portion of the allowance includes loans held-for-sale.  At December 31, 2021, the Bank had loans held-for-sale with a principal balance of $513,000. These loans were still part of the portfolio as of December 31, 2021.  Based on ASC 948, Mortgage Banking, loans shall be classified as held-for-sale once a decision has been made to sell the loans and shall be transferred to the held-for-sale category at lower of cost or fair value.

[2] The ending balance of the loans receivable for the unallocated portion of the allowance includes loans held-for-sale.  At December 31, 2020, the Bank had loans held-for-sale with a principal balance of $1.5 million. These loans were still part of the portfolio as of December 31, 2020.  Based on ASC 948, Mortgage Banking, loans shall be classified as held-for-sale once a decision has been made to sell the loans and shall be transferred to the held-for-sale category at lower of cost or fair value.