Note 14 - Financial Derivatives - Not Designated as Hedging (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Foreign Exchange Forward [Member]
Notional	$ 0	$ 908
Option contracts, fair value	0	(7)
Spot, Forward, and Swap Contracts with Positive Fair Value [Member]
Notional	151,244	146,397
Option contracts, fair value	4,658	2,411
Spot, Forward, and Swap Contracts with Negative Fair Value [Member]
Notional	132,813	127,003
Option contracts, fair value	$ (2,200)	$ (1,415)