Note 12 - Derivatives and Hedging Activities - Net (Gains) Losses Reclassified from Accumulated Other Comprehensive Loss (Details) - Derivatives Designated as Cash Flow Hedging Instruments [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Gain (loss) reclassified from accumulated OCI into income, Effective portion, Net, Total	$ (117)	$ 63	$ (304)	$ 259
Foreign Exchange Option Contracts [Member]
Gain (loss) reclassified from accumulated OCI into income, Effective portion, Net, Total	(27)	20	(34)	117
Foreign Exchange Forward Contracts [Member]
Gain (loss) reclassified from accumulated OCI into income, Effective portion, Net, Total	$ (90)	$ 43	$ (270)	$ 142