Note 16 - Financial Derivatives - Not Designated as Hedging (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Foreign Exchange Forward [Member]
Notional	$ 850	$ 908
Option contracts, fair value	(6)	(7)
Spot, Forward, and Swap Contracts with Positive Fair Value [Member]
Notional	107,071	146,397
Option contracts, fair value	3,236	2,411
Spot, Forward, and Swap Contracts with Negative Fair Value [Member]
Notional	160,489	127,003
Option contracts, fair value	$ (1,592)	$ (1,415)