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Note 4 - Loans Receivable - Activity in the Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Beginning balance	$ 7,202	$ 6,857	$ 6,715	$ 7,751
Provision for (recovery of) loan losses	350	(6)	1,085	(1,019)
Loans charged off	(191)	(2)	(472)	(103)
Recoveries	25	46	58	266
Total ending allowance balance	7,386	6,895	7,386	6,895
Commercial Portfolio Segment [Member]
Beginning balance	2,149	1,377	1,652	1,536
Provision for (recovery of) loan losses	171	176	718	15
Loans charged off	(104)	0	(155)	(86)
Recoveries	15	1	16	89
Total ending allowance balance	2,231	1,554	2,231	1,554
Consumer Portfolio Segment [Member]
Beginning balance	42	47	44	54
Provision for (recovery of) loan losses	86	(2)	101	4
Loans charged off	(16)	(2)	(49)	(17)
Recoveries	0	0	16	2
Total ending allowance balance	112	43	112	43
One-to-Four Family Residential Real Estate [Member] | Real Estate Portfolio [Member]
Beginning balance	286	396	331	518
Provision for (recovery of) loan losses	98	(33)	53	(264)
Loans charged off	(71)	0	(76)	0
Recoveries	2	38	7	147
Total ending allowance balance	315	401	315	401
Multi-family Mortgage [Member] | Real Estate Portfolio [Member]
Beginning balance	3,630	3,690	3,377	4,062
Provision for (recovery of) loan losses	(74)	(118)	170	(511)
Recoveries	6	7	15	28
Total ending allowance balance	3,562	3,579	3,562	3,579
Nonresidential Real Estate [Member] | Real Estate Portfolio [Member]
Beginning balance	1,093	1,336	1,311	1,569
Provision for (recovery of) loan losses	67	(30)	39	(263)
Loans charged off	0		(192)
Total ending allowance balance	1,162	1,306	1,162	1,306
Construction and Land Loans [Member]
Beginning balance	2	11	0	12
Provision for (recovery of) loan losses	2	1	4	0
Loans charged off		0		0
Recoveries		0		0
Total ending allowance balance	$ 4	$ 12	$ 4	$ 12

X

- Definition

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

+ References

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)(4)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

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X

- Definition

Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

+ References

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)(3)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

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X

- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 6.L.1)
-URI https://asc.fasb.org/extlink&oid=122038336&loc=d3e74567-122707

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)(1)(ii)
-URI https://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544

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-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

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X

- Definition

Amount of expense related to estimated loss from loan and lease transactions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
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-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

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 https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

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