Note 18 - Segment Reporting - Long-lived Assets by Geographic Region (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Long-lived assets	$ 263,712	$ 228,001	$ 166,440
Operating Segments [Member] \| United States Segment [Member]
Long-lived assets	210,171	185,979	125,308
Operating Segments [Member] \| Europe Segment [Member]
Long-lived assets	45,019	34,577	33,691
Operating Segments [Member] \| Japan Segment [Member]
Long-lived assets	$ 8,522	$ 7,445	$ 7,441

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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