Note 17 - Segment Reporting - Long-lived Assets by Geographic Region (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Long-lived assets	$ 282,666	$ 263,712	$ 228,001
Operating Segments [Member] \| United States Segment [Member]
Long-lived assets	215,721	210,171	185,979
Operating Segments [Member] \| Europe Segment [Member]
Long-lived assets	59,388	45,019	34,577
Operating Segments [Member] \| Japan Segment [Member]
Long-lived assets	$ 7,557	$ 8,522	$ 7,445

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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