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Note 12 - Segment Reporting (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

Income from Operations by Geographic Area [Table Text Block]

		Three Months Ended September 30,								Nine Months Ended September 30,
(in thousands)		2018				2017				2018				2017
Income from Operations:
United States		$	31,726			$	26,903			$	92,258			$	76,973
Europe			5,478				3,251				12,879				9,626
Corporate Unallocated and Japan			(12,173	)			(10,787	)			(36,394	)			(33,148	)
Total Income from Operations		$	25,031			$	19,367			$	68,743			$	53,451

Long-lived Assets by Geographic Areas [Table Text Block]

		September 30,				December 31,
(in thousands)		2018				2017
Total long-lived assets:
United States		$	168,903			$	125,308
Europe			33,783				33,691
Japan			7,367				7,441
Total Assets		$	210,053			$	166,440

Operating Segments [Member]

Notes Tables

Revenue from External Customers by Geographic Areas [Table Text Block]

		Three Months Ended September 30,								Nine Months Ended September 30,
(in thousands)		2018				2017				2018				2017
Revenue:
United States		$	90,732			$	67,490			$	261,253			$	191,019
Europe			21,273				18,094				61,431				51,224
Japan			3,425				2,521				10,143				8,069
Total revenue		$	115,430			$	88,105			$	332,827			$	250,312

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