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Note 4 - Goodwill and Other Intangible Assets (Details Textual) $ in Thousands	3 Months Ended		9 Months Ended	12 Months Ended
	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Number of Reportable Segments				3
Goodwill, Impairment Loss			$ 8,891	$ 0	$ 0
Amortization of Intangible Assets, Total				6,400	$ 6,400
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)				$ 0
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life				1 year
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life				16 years
North America [Member]
Goodwill, Impairment Loss		$ 8,900	8,891
Europe [Member]
Goodwill, Impairment Loss	$ 0
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount		17.30%	17.30%