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Note 10 - Derivatives (Details Textual) € in Millions, $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2022 EUR (€)	Jun. 30, 2022 USD ($)	Jun. 30, 2022 EUR (€)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 EUR (€)
Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months \| $		$ 1.2
Foreign Exchange Forward [Member] \| Not Designated as Hedging Instrument [Member]
Derivative, Notional Amount \| $		$ 145.8		$ 45.0
Currency Swap [Member] \| Designated as Hedging Instrument [Member] \| Cash Flow Hedging [Member]
Derivative, Notional Amount					€ 152.4
Currency Swap [Member] \| Designated as Hedging Instrument [Member] \| Fair Value Hedging [Member]
Derivative, Notional Amount			€ 85.9
Debt Instrument, Periodic Payment, Interest	€ 10.9
Debt Instrument, Periodic Payment, Principal	€ 75.0
Currency Swap [Member] \| Designated as Hedging Instrument [Member] \| Net Investment Hedging [Member]
Derivative, Notional Amount			€ 75.0