Note 5 - Allowance for Credit Losses - Activity in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Beginning balance	$ 4,379	$ 3,861	$ 3,861
Merger adjustment	725
Charge-offs	(97)	(37)	(62)
Recoveries	15	10	11
Provisions (Credits)	4,490	117	569
Ending Balance	9,512	3,951	4,379
Allowance for Credit Losses, Individually Evaluated	21		20
Allowance for Credit Losses, Collectively Evaluated	9,491		4,359
Loans Receivable, Individually Evaluated	2,225		2,105
Loans Receivable, Collectively Evaluated	899,399		435,053
Loans, before fees	901,624		437,158
Commercial Portfolio Segment [Member]
Beginning balance	1,007	793	793
Merger adjustment	423
Charge-offs	(25)	0	0
Recoveries	4	1	2
Provisions (Credits)	1,257	23	212
Ending Balance	2,666	817	1,007
Allowance for Credit Losses, Individually Evaluated	7		17
Allowance for Credit Losses, Collectively Evaluated	2,659		990
Loans Receivable, Individually Evaluated	49		964
Loans Receivable, Collectively Evaluated	161,646		87,026
Loans, before fees	161,695		87,990
Commercial Real Estate Portfolio Segment [Member]
Beginning balance	2,366	1,741	1,741
Merger adjustment	114
Charge-offs	0	0	0
Recoveries	0	0	0
Provisions (Credits)	1,611	273	625
Ending Balance	4,091	2,014	2,366
Allowance for Credit Losses, Individually Evaluated	0		0
Allowance for Credit Losses, Collectively Evaluated	4,091		2,366
Loans Receivable, Individually Evaluated	5		289
Loans Receivable, Collectively Evaluated	341,590		212,306
Loans, before fees	341,595		212,595
Residential Portfolio Segment [Member] \| Real Estate Loan [Member]
Beginning balance	823	792	792
Merger adjustment	178
Charge-offs	0	0	0
Recoveries	0	0	0
Provisions (Credits)	1,323	5	31
Ending Balance	2,324	797	823
Allowance for Credit Losses, Individually Evaluated	12		3
Allowance for Credit Losses, Collectively Evaluated	2,312		820
Loans Receivable, Individually Evaluated	2,142		852
Loans Receivable, Collectively Evaluated	351,928		120,493
Loans, before fees	354,070		121,345
Residential Portfolio Segment [Member] \| Home Equity Loan [Member]
Beginning balance	83	60	60
Merger adjustment	7
Charge-offs	0	0	0
Recoveries	0	0	0
Provisions (Credits)	176	14	23
Ending Balance	266	74	83
Allowance for Credit Losses, Individually Evaluated	0		0
Allowance for Credit Losses, Collectively Evaluated	266		83
Loans Receivable, Individually Evaluated	26		0
Loans Receivable, Collectively Evaluated	31,198		7,186
Loans, before fees	31,224		7,186
Consumer Portfolio Segment [Member] \| Consumer, Other [Member]
Beginning balance	18	44	44
Merger adjustment	3
Charge-offs	(24)	(10)	(10)
Recoveries	2	0	0
Provisions (Credits)	65	(16)	(16)
Ending Balance	64	18	18
Allowance for Credit Losses, Individually Evaluated	2		0
Allowance for Credit Losses, Collectively Evaluated	62		18
Loans Receivable, Individually Evaluated	3		0
Loans Receivable, Collectively Evaluated	4,439		1,526
Loans, before fees	4,442		1,526
Consumer Portfolio Segment [Member] \| Automobile Loan [Member]
Beginning balance	82	85	85
Merger adjustment	0
Charge-offs	(48)	(27)	(52)
Recoveries	9	9	9
Provisions (Credits)	58	17	40
Ending Balance	101	84	82
Allowance for Credit Losses, Individually Evaluated	0		0
Allowance for Credit Losses, Collectively Evaluated	101		82
Loans Receivable, Individually Evaluated	0		0
Loans Receivable, Collectively Evaluated	8,598		6,516
Loans, before fees	8,598		6,516
Unallocated Financing Receivables [Member]
Beginning balance	$ 0	346	346
Charge-offs		0	0
Recoveries		0	0
Provisions (Credits)		(199)	(346)
Ending Balance		$ 147	$ 0

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

Reference 1: 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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Amount of allowance for credit loss on financing receivable evaluated on collective basis. Excludes financing receivable evaluated on individual basis.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
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-Publisher FASB
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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
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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
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-Publisher FASB
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Amortized cost excluding accrued interest, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: 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))
-Publisher FASB
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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
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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Amount of financing receivable individually evaluated for credit loss. Excludes financing receivable collectively evaluated for credit loss.

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