Note 2 - Summary of Presentation - Assumptions Used in Measuring Fair Value of MSRs (Details)	Dec. 31, 2021
Measurement Input, Discount Rate [Member]
MSRs, assumption	0.114
Measurement Input, Prepayment Rate [Member]
MSRs, assumption	0.044

Value of input used to measure servicing asset.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

Name:	us-gaap_ServicingAssetMeasurementInput
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant