Note 5 - Financing Arrangements - Effects of Derivative Instruments on Comprehensive Income (Loss) (Details) - Interest Rate Swap [Member] - Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Amount of (loss) gain recognized in AOCI on derivatives	$ 1,039	$ (809)	$ 0
Amount of (loss) gain reclassed from AOCI into income	$ (1,630)	$ 0	$ 0

Note 5 - Financing Arrangements - Effects of Derivative Instruments on Comprehensive Income (Loss) (Details) - Interest Rate Swap [Member] - Designated as Hedging Instrument [Member] - USD ($)
$ in Thousands

12 Months Ended

Dec. 31, 2023

Dec. 31, 2022

Dec. 31, 2021

Amount of (loss) gain recognized in AOCI on derivatives

$ 1,039

$ (809)

$ 0

Amount of (loss) gain reclassed from AOCI into income

$ (1,630)

$ 0