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Note 13 - Segment Reporting - Long-lived Assets by Geographic Region (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Long-lived assets | $ 260,631 | $ 280,346
Operating Segments [Member] | United States Segment [Member] |  |
Long-lived assets | 205,090 | 215,701
Operating Segments [Member] | Europe Segment [Member] |  |
Long-lived assets | 52,880 | 59,388
Operating Segments [Member] | Japan Segment [Member] |  |
Long-lived assets | $ 2,661 | $ 5,257

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