Note 5 - Goodwill - Goodwill (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2019	Dec. 31, 2018
Goodwill, gross	$ 148,260	$ 148,408
Accumulated impairment charges	(137,482)	(128,591)
Goodwill	10,778	19,817
Impairment charge (see Note 4)	(8,891)
Foreign currency translation	(122)
Measurement period adjustment	(26)
North America [Member]
Goodwill, gross	63,364	63,364
Accumulated impairment charges	(63,364)	(54,473)
Goodwill		8,891
Impairment charge (see Note 4)	(8,891)
Foreign currency translation
Measurement period adjustment
Asia [Member]
Goodwill, gross	54,508	54,508
Accumulated impairment charges	(54,508)	(54,508)
Goodwill
Impairment charge (see Note 4)
Foreign currency translation
Measurement period adjustment
Europe [Member]
Goodwill, gross	30,388	30,536
Accumulated impairment charges	(19,610)	(19,610)
Goodwill	10,778	$ 10,926
Impairment charge (see Note 4)
Foreign currency translation	(122)
Measurement period adjustment	$ (26)

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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