Note 11 - Segment Reporting - Long-lived Assets by Geographic Region (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Long-lived assets	$ 268,001	$ 263,712
Operating Segments [Member]
Long-lived assets	268,001	263,712
Operating Segments [Member] \| United States Segment [Member]
Long-lived assets	215,691	210,171
Operating Segments [Member] \| Europe Segment [Member]
Long-lived assets	43,984	45,019
Operating Segments [Member] \| Japan Segment [Member]
Long-lived assets	$ 8,326	$ 8,522

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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