Loans Receivable and the Allowance for Loan Losses - Allowance (Details) - USD ($)	9 Months Ended	12 Months Ended
Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2019	Dec. 31, 2018
Allowance for Loan Losses:
Beginning Balance	$ 850,000	$ 850,000
Recoveries	9,000	11,000
Provision	(9,000)	(11,000)
Ending Balance	850,000	850,000
Ending Balance: Collectively Evaluated for Impairment			$ 850,000	$ 850,000
Loans Receivable: Ending Balance			80,163,000	80,688,000
Ending Balance: Collectively Evaluated for Impairment			80,163,000	80,688,000
Allowance for loan losses, unallocated portion	850,000	850,000	850,000	850,000
Loan balances outstanding on non-accrual status			0	0
Mortgage - 1-4 Family
Allowance for Loan Losses:
Beginning Balance	807,000	813,000
Recoveries	9,000	11,000
Provision	(4,000)	(17,000)
Ending Balance	812,000	807,000
Ending Balance: Collectively Evaluated for Impairment			812,000	807,000
Loans Receivable: Ending Balance			75,225,000	75,185,000
Ending Balance: Collectively Evaluated for Impairment			75,225,000	75,185,000
Allowance for loan losses, unallocated portion	807,000	813,000	812,000	807,000
Mortgage - Multifamily
Allowance for Loan Losses:
Beginning Balance	31,000	20,000
Provision	(4,000)	11,000
Ending Balance	27,000	31,000
Ending Balance: Collectively Evaluated for Impairment			27,000	31,000
Loans Receivable: Ending Balance			3,600,000	4,117,000
Ending Balance: Collectively Evaluated for Impairment			3,600,000	4,117,000
Allowance for loan losses, unallocated portion	31,000	20,000	27,000	31,000
Mortgage - Commercial real estate
Allowance for Loan Losses:
Beginning Balance	12,000	17,000
Provision	(1,000)	(5,000)
Ending Balance	11,000	12,000
Ending Balance: Collectively Evaluated for Impairment			11,000	12,000
Loans Receivable: Ending Balance			1,131,000	1,175,000
Ending Balance: Collectively Evaluated for Impairment			1,131,000	1,175,000
Allowance for loan losses, unallocated portion	12,000	17,000	11,000	12,000
Consumer Loans
Allowance for Loan Losses:
Loans Receivable: Ending Balance			207,000	211,000
Ending Balance: Collectively Evaluated for Impairment			207,000	211,000
Unallocated finance receivable
Allowance for Loan Losses:
Beginning Balance	433,000
Ending Balance	431,000	433,000
Allowance for loan losses, unallocated portion	$ 433,000	$ 433,000	$ 431,000	$ 433,000

A valuation allowance for financing receivables that are expected to be uncollectible.

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- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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- Definition

Amount of recovery of financing receivables doubtful of collection that were previously charged off.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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The balance of financing receivables that were collectively evaluated for impairment.

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- Definition

Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524

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- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522

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- Definition

Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

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