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Note 4 - Loans Receivable - Activity in the Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Beginning balance	$ 7,751	$ 7,632
(Recovery of) provision for loan losses	(1,240)	55
Loans charged off	(132)	(71)
Recoveries	336	135
Total ending allowance balance	6,715	7,751
Commercial Portfolio Segment [Member]
Beginning balance	1,536	2,065
(Recovery of) provision for loan losses	119	(533)
Loans charged off	(93)
Recoveries	90	4
Total ending allowance balance	1,652	1,536
Consumer Portfolio Segment [Member]
Beginning balance	54	40
(Recovery of) provision for loan losses	17	76
Loans charged off	(29)	(62)
Recoveries	2
Total ending allowance balance	44	54
Construction and Land Loans [Member]
Beginning balance	12
(Recovery of) provision for loan losses		12
Total ending allowance balance		12
One-to-Four Family Residential Real Estate [Member] | Real Estate Portfolio [Member]
Beginning balance	518	675
(Recovery of) provision for loan losses	(395)	(185)
Loans charged off	(3)	(9)
Recoveries	211	37
Total ending allowance balance	331	518
Multi-family Mortgage [Member] | Real Estate Portfolio [Member]
Beginning balance	4,062	3,676
(Recovery of) provision for loan losses	(718)	292
Recoveries	33	94
Total ending allowance balance	3,377	4,062
Nonresidential Real Estate [Member] | Real Estate Portfolio [Member]
Beginning balance	1,569	1,176
(Recovery of) provision for loan losses	(251)	393
Loans charged off	(7)
Total ending allowance balance	1,311	1,569
Construction and Land Loans [Member]
Beginning balance	12
(Recovery of) provision for loan losses	(12)
Total ending allowance balance	$ 0	$ 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 http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

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

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- 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 http://asc.fasb.org/extlink&oid=122038336&loc=d3e74567-122707

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- 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 http://asc.fasb.org/extlink&oid=123570139&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
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-URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

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