Note 5 - Derivative Instruments and Hedging Activities - Movement in AOCI Balance (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
AOCI balance, Gains and losses on cash flow hedges	$ 1,424		$ 3,038
AOCI balance, Tax impact	(327)		(702)
AOCI balance	1,097		2,336
Other comprehensive income (loss) before reclassifications, Gains and losses on cash flow hedges	(654)		148
Other comprehensive income (loss) before reclassifications, Tax impact	153		(33)
Other comprehensive income (loss) before reclassifications	(501)	$ 729	115	$ 609
Amount reclassified from AOCI, Gains and losses on cash flow hedges	(1,150)		(3,566)
Amount reclassified from AOCI, Tax impact	266		827
Amount reclassified from AOCI	(884)	$ 46	(2,739)	$ 289
Other comprehensive income (loss) for the three months ended September 30, 2021	(1,804)		(3,418)
Other comprehensive income (loss) for the three months ended September 30, 2021	419		794
Other comprehensive income (loss) for the three months ended September 30, 2021	(1,385)		(2,624)
AOCI balance, Gains and losses on cash flow hedges	(380)		(380)
AOCI balance, Tax impact	92		92
AOCI balance	$ (288)		$ (288)