Note 12 - Segment Reporting - Long-lived Assets by Geographic Region (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Long-lived assets	$ 279,901	$ 282,666
Operating Segments [Member]
Long-lived assets	279,901	282,666
Operating Segments [Member] \| United States Segment [Member]
Long-lived assets	213,434	215,721
Operating Segments [Member] \| Europe Segment [Member]
Long-lived assets	59,795	59,388
Operating Segments [Member] \| Japan Segment [Member]
Long-lived assets	$ 6,672	$ 7,557

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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