Note 4 - Loans Receivable and Allowance for Credit Losses - Summary of Allowance for Credit Losses of Financing Receivables (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Financing receivable, allowance for credit losses, balance	$ 34,921	$ 33,091	$ 34,649	$ 32,573	$ 32,573
Financing receivable, allowance fore credit losses, charge-offs	(979)	0	(979)	0
Financing receivable, allowance for credit losses, recoveries	6	1	8	2
Financing receivable, allowance for credit losses, provision (benefit)	676	678	946	1,195
Financing receivable, allowance for credit losses, balance	34,624	33,770	34,624	33,770	34,649
Commercial Portfolio Segment [Member]
Financing receivable, allowance for credit losses, balance	1,032	1,048	1,008	1,097	1,097
Financing receivable, allowance fore credit losses, charge-offs	0	0	0	0	0
Financing receivable, allowance for credit losses, recoveries	6	1	8	2
Financing receivable, allowance for credit losses, provision (benefit)	(48)	(58)	(26)	(108)
Financing receivable, allowance for credit losses, balance	990	991	990	991	1,008
Construction Portfolio Segment [Member]
Financing receivable, allowance for credit losses, balance	3,895	2,275	4,032	3,037	3,037
Financing receivable, allowance fore credit losses, charge-offs	0	0	0	0	0
Financing receivable, allowance for credit losses, recoveries	0	0	0	0
Financing receivable, allowance for credit losses, provision (benefit)	290	847	153	85
Financing receivable, allowance for credit losses, balance	4,185	3,122	4,185	3,122	4,032
Real Estate Portfolio Segment [Member] \| Mortgage on Commercial Property Occupied by Owner [Member]
Financing receivable, allowance for credit losses, balance	2,214	2,470	2,239	1,871	1,871
Financing receivable, allowance fore credit losses, charge-offs	0	0	0	0	0
Financing receivable, allowance for credit losses, recoveries	0	0	0	0
Financing receivable, allowance for credit losses, provision (benefit)	417	(432)	392	167
Financing receivable, allowance for credit losses, balance	2,631	2,038	2,631	2,038	2,239
Real Estate Portfolio Segment [Member] \| Mortgage on Commercial Property Occupied by Non Owners [Member]
Financing receivable, allowance for credit losses, balance	9,225	7,361	9,661	6,300	6,300
Financing receivable, allowance fore credit losses, charge-offs	(979)	0	(979)	0	(202)
Financing receivable, allowance for credit losses, recoveries	0	0	0	0
Financing receivable, allowance for credit losses, provision (benefit)	(18)	1,199	(454)	2,260
Financing receivable, allowance for credit losses, balance	8,228	8,560	8,228	8,560	9,661
Real Estate Portfolio Segment [Member] \| Mortgage on Residential Properties Occupied by One to Four Families [Member]
Financing receivable, allowance for credit losses, balance	7,931	8,814	8,205	9,166	9,166
Financing receivable, allowance fore credit losses, charge-offs	0	0	0	0
Financing receivable, allowance for credit losses, recoveries	0	0	0	0
Financing receivable, allowance for credit losses, provision (benefit)	(255)	(443)	(529)	(795)
Financing receivable, allowance for credit losses, balance	7,676	8,371	7,676	8,371	8,205
Real Estate Portfolio Segment [Member] \| Mortgage on Residential Properties Occupied by One to Four Family Investment [Member]
Financing receivable, allowance for credit losses, balance	8,127	8,855	7,601	8,832	8,832
Financing receivable, allowance fore credit losses, charge-offs	0	0	0	0	0
Financing receivable, allowance for credit losses, recoveries	0	0	0	0
Financing receivable, allowance for credit losses, provision (benefit)	(200)	(362)	326	(339)
Financing receivable, allowance for credit losses, balance	7,927	8,493	7,927	8,493	7,601
Real Estate Portfolio Segment [Member] \| Mortgage on Residential Properties Occupied by Multifamily [Member]
Financing receivable, allowance for credit losses, balance	2,441	2,202	1,845	2,203	2,203
Financing receivable, allowance fore credit losses, charge-offs	0	0	0	0	0
Financing receivable, allowance for credit losses, recoveries	0	0	0	0
Financing receivable, allowance for credit losses, provision (benefit)	490	(61)	1,086	(62)
Financing receivable, allowance for credit losses, balance	2,931	2,141	2,931	2,141	1,845
Consumer Portfolio Segment [Member]
Financing receivable, allowance for credit losses, balance	56	66	58	67	67
Financing receivable, allowance fore credit losses, charge-offs	0	0	0	0	0
Financing receivable, allowance for credit losses, recoveries	0	0	0	0
Financing receivable, allowance for credit losses, provision (benefit)	0	(12)	(2)	(13)
Financing receivable, allowance for credit losses, balance	$ 56	$ 54	$ 56	$ 54	$ 58

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477657/942-210-S45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478478/942-210-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(7)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

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- Definition

Amount, excluding accrued interest, of increase in allowance for credit loss on financing receivable from recovery. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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- Definition

Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

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- Definition

Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476148/220-40-50-22

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