Note 15 - Financial Derivatives - Not Designated as Hedging (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 30, 2021	Dec. 31, 2020
Foreign Exchange Forward [Member]
Notional	$ 0		$ 676
Option contracts	$ 0		2,911
Spot, Forward, and Swap Contracts with Positive Fair Value [Member]
Notional		$ 208,263	181,997
Option contracts		1,376	1,113
Spot, Forward, and Swap Contracts with Negative Fair Value [Member]
Notional		27,587	51,782
Option contracts		$ (142)	$ (327)