Note 4 - Derivatives - Amount and Fair Value of Mortgage Banking Derivatives (Details) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Interest Rate Contract [Member]
Derivative, amount	$ 16,393,000	$ 20,340,000
Derivative, net	190,000	657,000
Forward Contracts [Member]
Derivative, amount	15,000,000	20,500,000
Derivative, net	$ (22,000)	$ 6,000

Nominal or face amount used to calculate payment on derivative.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959

Name:	us-gaap_DerivativeNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant