Note 6 - Derivative and Hedging Transactions - Fair Values of Derivative Instruments on the Balance Sheet (Details) - USD ($) $ in Thousands		Mar. 31, 2020	Dec. 31, 2019
Derivative assets, Netting adjustments	[1]
Derivative liabilities, Netting adjustments	[1]
Net derivative assets in the balance sheet
Net derivative liabilities in the balance sheet		14
Derivative assets, Cash and other collateral	[2]
Derivative liabilities, Cash and other collateral	[2]
Net derivative asset amounts
Net derivative liability amounts		14
Designated as Hedging Instrument [Member]
Derivative assets
Derivative liabilities		14
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Derivative assets
Interest rate products		10,000
Derivative liabilities		$ 14

[1] Netting adjustments represents the amounts recorded to convert derivatives assets and liabilities from a gross basis to a net basis in accordance with the applicable accounting guidance.

[2] Other collateral represents the amount that cannot be used to offset our derivative assets and liabilities from a gross basis to a net basis in accordance with the applicable accounting guidance. The other collateral consist of securities and is exchanged under bilateral collateral and master netting agreements that allow us to offset the net derivative position with the related collateral. The application of the other collateral cannot reduce the net derivative position below zero. Therefore, excess other collateral, if any, is not reflected above.