Allowance for Loan Losses (Summary of Internal Loan Grades Applied to Loan Portfolio) (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2020		Dec. 31, 2019
Allowance for Loan Losses [Line Items]
Loans and Leases Receivable, Gross		$ 493,323	[1]	$ 471,535	[2]
Pass/ Performing [Member]
Allowance for Loan Losses [Line Items]
Loans and Leases Receivable, Gross		469,308		460,449
Special Mention [Member]
Allowance for Loan Losses [Line Items]
Loans and Leases Receivable, Gross		15,507		6,998
Substandard [Member]
Allowance for Loan Losses [Line Items]
Loans and Leases Receivable, Gross		8,508		4,088
Real Estate Loans: One-to-Four Family [Member]
Allowance for Loan Losses [Line Items]
Loans and Leases Receivable, Gross	[3]	151,356		154,749
Real Estate Loans: One-to-Four Family [Member] | Pass/ Performing [Member]
Allowance for Loan Losses [Line Items]
Loans and Leases Receivable, Gross	[4]	148,727		152,115
Real Estate Loans: One-to-Four Family [Member] | Substandard [Member]
Allowance for Loan Losses [Line Items]
Loans and Leases Receivable, Gross	[4]	2,629		2,634
Real Estate Loans: Home Equity [Member]
Allowance for Loan Losses [Line Items]
Loans and Leases Receivable, Gross		47,073	[1]	45,250	[2]
Real Estate Loans: Home Equity [Member] | Pass/ Performing [Member]
Allowance for Loan Losses [Line Items]
Loans and Leases Receivable, Gross		46,098		44,403
Real Estate Loans: Home Equity [Member] | Substandard [Member]
Allowance for Loan Losses [Line Items]
Loans and Leases Receivable, Gross		975		847
Real Estate Loans: Commercial [Member]
Allowance for Loan Losses [Line Items]
Loans and Leases Receivable, Gross		216,571	[1],[5]	211,220	[2]
Real Estate Loans: Commercial [Member] | Pass/ Performing [Member]
Allowance for Loan Losses [Line Items]
Loans and Leases Receivable, Gross		201,494	[5]	208,042
Real Estate Loans: Commercial [Member] | Special Mention [Member]
Allowance for Loan Losses [Line Items]
Loans and Leases Receivable, Gross		14,477	[5]	2,573
Increase in loans and leases receivable		13,300
Real Estate Loans: Commercial [Member] | Substandard [Member]
Allowance for Loan Losses [Line Items]
Loans and Leases Receivable, Gross		600	[5]	605
Real Estate Loans: Construction - Commercial [Member]
Allowance for Loan Losses [Line Items]
Loans and Leases Receivable, Gross		37,338	[1]	32,299	[2]
Real Estate Loans: Construction - Commercial [Member] | Pass/ Performing [Member]
Allowance for Loan Losses [Line Items]
Loans and Leases Receivable, Gross		37,338		32,299
Other Loans: Commercial [Member]
Allowance for Loan Losses [Line Items]
Loans and Leases Receivable, Gross		39,673	[1],[6],[7]	26,720	[2]
PPP loans outstanding		$ 18,600
PPP loans guaranteed by SBA, percent		100.00%
Other Loans: Commercial [Member] | Pass/ Performing [Member]
Allowance for Loan Losses [Line Items]
Loans and Leases Receivable, Gross		$ 34,340	[6]	22,295
PPP loans outstanding		$ 18,600
PPP loans guaranteed by SBA, percent		100.00%
Other Loans: Commercial [Member] | Special Mention [Member]
Allowance for Loan Losses [Line Items]
Loans and Leases Receivable, Gross		$ 1,030	[6]	4,425
Other Loans: Commercial [Member] | Substandard [Member]
Allowance for Loan Losses [Line Items]
Loans and Leases Receivable, Gross	[6]	4,303
Other Loans: Consumer [Member]
Allowance for Loan Losses [Line Items]
Loans and Leases Receivable, Gross		1,312	[1]	1,297	[2]
Other Loans: Consumer [Member] | Pass/ Performing [Member]
Allowance for Loan Losses [Line Items]
Loans and Leases Receivable, Gross		1,311		1,295
Other Loans: Consumer [Member] | Substandard [Member]
Allowance for Loan Losses [Line Items]
Loans and Leases Receivable, Gross		$ 1		$ 2

[1] Gross Loans Receivable does not include allowance for loan losses of $(5,347) or deferred loan costs of $3,292.

[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.

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

[5] The increase in commercial real estate loans classified as "Special Mention" was primarily due to a $13.3 million loan relationship with one borrower that is well collateralized and supported by guarantors.

[6] Includes $18.6 million of PPP loans which are 100% guaranteed by SBA and are graded as Pass/Performing loans.

[7] Includes $18.6 million of PPP loans which do not require payments for a certain amount of time under the CARES Act and are 100% guaranteed by SBA