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Note 13 - Segment Reporting - Income From Operations (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Income from operations | $ 7,890 | $ 4,261
Operating Segments [Member] | United States Segment [Member] |  |
Income from operations | 22,524 | 22,503
Operating Segments [Member] | Europe Segment [Member] |  |
Income from operations | (1,679) | (1,371)
Operating Segments [Member] | Corporate Unallocated and Japan Segment[Member] |  |
Income from operations | $ (12,955) | $ (16,871)

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