Note 2 - Fair Value of Financial Instruments - Summary of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Foreign currency forward contracts	$ 538	$ 942
Foreign currency forward contracts	(3,877)	(1,074)
Designated as Hedging Instrument [Member]
Foreign currency forward contracts	511	427
Foreign currency forward contracts	(2,200)	(524)
Not Designated as Hedging Instrument [Member]
Foreign currency forward contracts	27	515
Foreign currency forward contracts	$ (1,677)	$ (550)