Note 7 - Derivative Instruments - Effect of Derivative Instruments Designated as Cash Flow Hedges (Details) - Designated as Hedging Instrument [Member] - Cash Flow Hedging [Member] - Foreign Exchange Contract [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Gain (Loss) Recognized in AOCI, net of tax	$ (860)	$ 65
Gain/ (Loss) Reclassified from AOCI into Income	$ 188	$ 0