Note 8 - 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	9 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2019
Gain (Loss) Recognized in AOCI, net of tax	$ 53	$ 923
Gain/ (Loss) Reclassified from AOCI into Income	$ 13	$ 433