Note 7 - Deposits (Details Textual) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Deposit Liabilities, Checking [Member]
Interest-Bearing Domestic Deposit, Brokered	$ 87.2	$ 140.2
Deposit Liabilities, Money Market [Member]
Interest-Bearing Domestic Deposit, Brokered	4.0	20.3
Deposit Liabilities, Certificates of Deposits Less Than 100,000 [Member]
Interest-Bearing Domestic Deposit, Brokered	$ 35.1	$ 202.1

Amount of interest-bearing domestic third-party deposits placed by or through the assistance of a deposit broker, also known as brokered deposit liabilities.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-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/2009/role/commonPracticeRef
-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/2009/role/commonPracticeRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(12))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

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