Loans Receivable, Part II (Details) - USD ($)		Jun. 30, 2020	Dec. 31, 2019
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		$ 6,447,000	$ 6,465,000
Current	[1]	1,427,356,000	1,381,566,000
Total Loans		1,433,803,000	1,388,031,000
Loan Receivable, Nonaccrual Status		1,400,000	2,000,000.0
90 or more days past due		0	0
1 to 59 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[2]	2,520,000	1,185,000
Loan Receivable, Nonaccrual Status		226,000	53,000
60 to 89 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[3]	18,000	648,000
Loan Receivable, Nonaccrual Status		12,000,000,000	291,000,000,000
Greater than 90 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		3,909,000	4,632,000
Residential Real Estate [Member] | One-to-Four Family [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		5,910,000	5,786,000
Current	[1]	461,436,000	474,494,000
Total Loans		467,346,000	480,280,000
Residential Real Estate [Member] | One-to-Four Family [Member] | 1 to 59 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[2]	2,452,000	1,179,000
Residential Real Estate [Member] | One-to-Four Family [Member] | 60 to 89 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[3]	12,000	638,000
Residential Real Estate [Member] | One-to-Four Family [Member] | Greater than 90 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		3,446,000	3,969,000
Residential Real Estate [Member] | Multi Family [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		356,000	360,000
Current	[1]	598,568,000	584,499,000
Total Loans		598,924,000	584,859,000
Residential Real Estate [Member] | Multi Family [Member] | 1 to 59 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[2]	0	0
Residential Real Estate [Member] | Multi Family [Member] | 60 to 89 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[3]	0	0
Residential Real Estate [Member] | Multi Family [Member] | Greater than 90 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		356,000	360,000
Residential Real Estate [Member] | Home Equity [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		75,000	10,000
Current	[1]	16,334,000	18,061,000
Total Loans		16,409,000	18,071,000
Residential Real Estate [Member] | Home Equity [Member] | 1 to 59 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[2]	29,000	0
Residential Real Estate [Member] | Home Equity [Member] | 60 to 89 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[3]	6,000	10,000
Residential Real Estate [Member] | Home Equity [Member] | Greater than 90 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		40,000	0
Construction and Land [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		0	0
Current	[1]	48,850,000	37,033,000
Total Loans		48,850,000	37,033,000
Construction and Land [Member] | 1 to 59 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[2]	0	0
Construction and Land [Member] | 60 to 89 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[3]	0	0
Construction and Land [Member] | Greater than 90 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		0	0
Commercial Real Estate [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		67,000	303,000
Current	[1]	244,708,000	236,400,000
Total Loans		244,775,000	236,703,000
Commercial Real Estate [Member] | 1 to 59 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[2]	0	0
Commercial Real Estate [Member] | 60 to 89 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[3]	0	0
Commercial Real Estate [Member] | Greater than 90 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		67,000	303,000
Consumer [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		0	0
Current	[1]	860,000	832,000
Total Loans		860,000	832,000
Consumer [Member] | 1 to 59 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[2]	0	0
Consumer [Member] | 60 to 89 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[3]	0	0
Consumer [Member] | Greater than 90 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		0	0
Commercial Loans [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		39,000	6,000
Current	[1]	56,600,000	30,247,000
Total Loans		56,639,000	30,253,000
Commercial Loans [Member] | 1 to 59 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[2]	39,000	6,000
Commercial Loans [Member] | 60 to 89 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[3]	0	0
Commercial Loans [Member] | Greater than 90 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		$ 0	$ 0

[1] Includes $1.4 million and $2.0 million at June 30, 2020 and December 31, 2019, respectively, which are on non-accrual status.

[2]  Includes $226,000 and $53,000 at June 30, 2020 and December 31, 2019, respectively, which are on non-accrual status.

[3] Includes $12,000 and $291,000 at June 30, 2020 and December 31, 2019, respectively, which are on non-accrual status.