Note 17 - Income Taxes (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Undistributed Earnings of Foreign Subsidiaries	$ 83.9
Deferred Tax Assets, Tax Credit Carryforwards, Total	4.5	$ 3.6
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	(2.7)
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	4.5	6.3
Unrecognized Tax Benefits, Ending Balance	4.7	6.4	$ 7.5
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	$ 0.7	$ 0.7
Minimum [Member]
Open Tax Year, Term (Year)	3 years
Maximum [Member]
Open Tax Year, Term (Year)	5 years
Domestic Tax Authority [Member]
Deferred Tax Assets, Tax Credit Carryforwards, Total	$ 3.2
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Open Tax Year	2018 2017 2018 2019 2020 2021
Foreign Tax Authority [Member]
Operating Loss Carryforwards, Total	$ 30.8
Operating Loss Carryforwards, Not subject to Expiration	30.8
Operating Loss Carryforwards, Subject to Expiration	0.1
Foreign Tax Authority [Member] | Tax and Customs Administration, Netherlands [Member]
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	$ 1.3