Note 9 - Derivative and Hedging Transactions - Effect of Hedge Accounting on Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Amount of Gain or (Loss) Recognized in OCI on Derivative	$ 46	$ 168
Amount of Gain or (Loss) Recognized in OCI Included Component	46	168
Amount of Gain or (Loss) Recognized in OCI Excluded Component	0	0
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income	176	(22)
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income Included Component	176	(22)
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income Excluded Component	0	0
Interest Rate Swap [Member] | Interest Expense [Member]
Amount of Gain or (Loss) Recognized in OCI on Derivative	46	168
Amount of Gain or (Loss) Recognized in OCI Included Component	46	168
Amount of Gain or (Loss) Recognized in OCI Excluded Component	0	0
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income	176	(22)
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income Included Component	176	(22)
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income Excluded Component	$ 0	$ 0