Note 7 - Securities Available for Sale (Details Textual) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Mar. 31, 2023
Other-than-temporary Impairment Loss, Available-for-Sale Debt Securities	$ 0
Available for Sale Securities, Accrued Interest Receivable		$ 400
Asset Pledged as Collateral [Member] \| Deposits [Member]
Securities Held as Collateral, at Fair Value	$ 45,900	$ 44,000

The carrying amount (fair value) as of the balance sheet date of securities held that had been pledged by counterparties under financing and lending arrangements, pursuant to which the entity has the right by agreement or custom to sell or re-pledge such securities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-5

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