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Note 4 - Goodwill and Other Intangible Assets (Details Textual) $ in Thousands			3 Months Ended		12 Months Ended
	Oct. 01, 2019	Jul. 31, 2019 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2019 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Number of Operating Segments	3				3
Goodwill, Impairment Loss			$ 0
Amortization of Intangible Assets, Total					$ 7,100	$ 6,400
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)					$ 0	$ 0
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)					1 year
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)					16 years	16 years
North America [Member]
Goodwill, Impairment Loss				$ 8,900
Europe [Member]
Goodwill, Impairment Loss		$ 0
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount		17.30%