Note 11 - Derivatives and Hedging Activities - Effective Portion of the Gains and Losses on Derivative Instruments Designated (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Gain (loss) recognized in other comprehensive income (loss), Effective portion, Net, Total	$ 156	$ 112	$ 357	$ 318
Derivatives Designated as Cash Flow Hedging Instruments [Member]
Gain (loss) recognized in other comprehensive income (loss), Effective portion, Net, Total	156	112	357	318
Derivatives Designated as Cash Flow Hedging Instruments [Member] | Foreign Exchange Option Contracts [Member]
Gain (loss) recognized in other comprehensive income (loss), Effective portion, Net, Total	3	13	(25)	29
Derivatives Designated as Cash Flow Hedging Instruments [Member] | Foreign Exchange Forward Contracts [Member]
Gain (loss) recognized in other comprehensive income (loss), Effective portion, Net, Total	$ 153	$ 99	$ 382	$ 289