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Note 12 - Segment Reporting - Revenue From Operations by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenue	$ 123,048	$ 106,575	$ 239,174	$ 221,683
Operating Segments [Member]
Revenue	123,048	106,575	239,174	221,683
Operating Segments [Member] | United States Segment [Member]
Revenue	95,344	86,823	186,397	176,899
Operating Segments [Member] | Europe Segment [Member]
Revenue	24,655	16,729	46,104	37,516
Operating Segments [Member] | Japan Segment [Member]
Revenue	$ 3,049	$ 3,023	$ 6,673	$ 7,268

X

- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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