Note 11 - Segment Reporting - Long-lived Assets by Geographic Region (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Long-lived assets	$ 253,616	$ 257,785
Operating Segments [Member] \| United States Segment [Member]
Long-lived assets	199,381	203,816
Operating Segments [Member] \| Europe Segment [Member]
Long-lived assets	54,101	53,835
Operating Segments [Member] \| Japan Segment [Member]
Long-lived assets	$ 134	$ 134

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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