Allowance for Loan Losses (Analysis of Past Due Loans and Non-Accruing Loans) (Details) - USD ($) $ in Thousands		Mar. 31, 2020		Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Total Past Due		$ 3,969		$ 5,897
Current Due		470,636		465,638
Total Loans Receivable		474,605	[1]	471,535	[2]
Loans on Non-Accrual		3,885		3,437
Real Estate Loans: One-to-Four Family [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due	[3]	3,117		3,841
Current Due	[3]	149,211		150,908
Total Loans Receivable	[3]	152,328		154,749
Loans on Non-Accrual	[3]	3,218		2,845
Real Estate Loans: Home Equity [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due		823		913
Current Due		45,135		44,337
Total Loans Receivable		45,958	[1]	45,250	[2]
Loans on Non-Accrual		660		590
Real Estate Loans: Commercial [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due				1,133
Current Due		214,943		210,087
Total Loans Receivable		214,943	[1]	211,220	[2]
Real Estate Loans: Construction - Commercial [Member]
Financing Receivable, Past Due [Line Items]
Current Due		34,701		32,299
Total Loans Receivable		34,701	[1]	32,299	[2]
Other Loans: Commercial [Member]
Financing Receivable, Past Due [Line Items]
Current Due		25,482		26,720
Total Loans Receivable		25,482	[1]	26,720	[2]
Other Loans: Consumer [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due		29		10
Current Due		1,164		1,287
Total Loans Receivable		1,193	[1]	1,297	[2]
Loans on Non-Accrual		7		2
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due		975		1,421
Financial Asset, 30 to 59 Days Past Due [Member] | Real Estate Loans: One-to-Four Family [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due	[3]	763		1,245
Financial Asset, 30 to 59 Days Past Due [Member] | Real Estate Loans: Home Equity [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due		195		168
Financial Asset, 30 to 59 Days Past Due [Member] | Other Loans: Consumer [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due		17		8
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due		345		1,967
Financial Asset, 60 to 89 Days Past Due [Member] | Real Estate Loans: One-to-Four Family [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due	[3]	328		672
Financial Asset, 60 to 89 Days Past Due [Member] | Real Estate Loans: Home Equity [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due		12		162
Financial Asset, 60 to 89 Days Past Due [Member] | Real Estate Loans: Commercial [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due				1,133
Financial Asset, 60 to 89 Days Past Due [Member] | Other Loans: Consumer [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due		5
Financing Receivables, 90 Days or More Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due		2,649		2,509
Financing Receivables, 90 Days or More Past Due [Member] | Real Estate Loans: One-to-Four Family [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due	[3]	2,026		1,924
Financing Receivables, 90 Days or More Past Due [Member] | Real Estate Loans: Home Equity [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due		616		583
Financing Receivables, 90 Days or More Past Due [Member] | Other Loans: Consumer [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due		$ 7		$ 2

[1] Gross Loans Receivable does not include allowance for loan losses of $(4,760) or deferred loan costs of $3,509.

[2] Gross Loans Receivable does not include allowance for loan losses of $(4,267) or deferred loan costs of $3,548.

[3] Includes one- to four-family construction loans.