Note 4 - Derivatives and Risk Management Activities - Summary of Derivative Instruments (Details) $ in Thousands	Mar. 31, 2026 USD ($)	Dec. 31, 2025 USD ($)
Matched Interest Rate Swap with Borrower [Member]
Notional amount	$ 142,474	$ 143,460
Positions	28	28
Derivative assets	$ 0	$ 0
Derivative liabilities	10,100	9,931
Collateral pledges	0	0
Matched Interest Rate Swap With Counterparty [Member]
Notional amount	$ 142,474	$ 143,460
Positions	28	28
Derivative assets	$ 10,100	$ 9,931
Derivative liabilities	0	0
Collateral pledges		$ 0
Collateral pledges	$ 0

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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+ Details

- Definition

The number of derivative instruments of a particular group held by the entity.

+ References + Details