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Note 12 - Segment Reporting - Income From Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income from operations	$ 16,104	$ 14,351	$ 20,365	$ 31,176
Operating Segments [Member]
Income from operations	16,104	14,351	20,365	31,176
Operating Segments [Member] | United States Segment [Member]
Income from operations	26,280	24,349	48,783	49,438
Operating Segments [Member] | Europe Segment [Member]
Income from operations	5,063	2,261	3,692	6,625
Operating Segments [Member] | Japan Segment [Member]
Income from operations	$ (15,239)	$ (12,259)	$ (32,110)	$ (24,887)

X

- Definition

The net result for the period of deducting operating expenses from operating revenues.

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