Note 4 - Loans and the Allowance for Credit Losses - Composition of Loans Held-for-sale (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Loans held-for-sale	$ 13,772	$ 250
Commercial Portfolio Segment [Member]
Loans held-for-sale	13,473	0
Residential Mortgage [Member]
Loans held-for-sale	$ 299	$ 250

Amount, before valuation allowance, of financing receivable classified as held-for-sale.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 310
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124265262&loc=d3e48678-111004

Name:	us-gaap_LoansReceivableHeldForSaleAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant