Note 3 - Loans and Allowance for Credit Losses - Allowance for Credit Losses on Unfunded Commitments (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Balance	$ 10,262	$ 9,094	$ 9,094
Recovery of credit losses	322	1,307	1,242
Balance	10,422	10,502	10,262
Unfunded Loan Commitment [Member]
Balance	251	259	259
Recovery of credit losses	(10)	(15)
Balance	$ 241	251	$ 251
Unfunded Loan Commitment [Member] \| Frontier Community Bank [Member]
FCB acquisition		$ 7

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
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-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Name:	us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant