Note 18 - Segment Reporting (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Income from Operations by Geographic Area [Table Text Block]

	Year Ended December 31,
(in thousands)	2019			2018			2017
Income from Operations:
United States	$	108,594		$	115,710		$	99,561
Europe		15,077			16,747			12,796
Corporate Unallocated and Japan		(43,815	)		(43,557	)		(40,131	)
Total income from operations	$	79,856		$	88,898		$	72,226

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

	December 31,		December 31,		December 31,
(in thousands)	2019		2018		2017
Long-lived assets:
United States	$	210,171	$	185,979	$	125,308
Europe		45,019		34,577		33,691
Japan		8,522		7,445		7,441
Total long-lived assets	$	263,712	$	228,001	$	166,440

Expenditures for Additions to Long-lived Assets by Geographic Region [Table Text Block]

	Year Ended December 31,
(in thousands)	2019		2018		2017
Expenditures for additions to long-lived assets:
United States	$	45,123	$	78,762	$	20,370
Europe		14,743		7,576		11,704
Japan		2,364		766		561
Total expenditures for additions to long-lived assets	$	62,230	$	87,104	$	32,635

Depreciation and Amortization by Geographic Region [Table Text Block]

	Year Ended December 31,
(in thousands)	2019		2018		2017
Depreciation and Amortization:
United States	$	24,767	$	21,117	$	13,267
Europe		4,746		4,679		4,174
Japan		1,351		958		1,033
Total depreciation and amortization	$	30,864	$	26,754	$	18,474

Operating Segments [Member]

Notes Tables

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

	Year Ended December 31,
(in thousands)	2019		2018		2017
Revenue:
United States	$	360,205	$	350,535	$	263,086
Europe		82,805		80,889		70,154
Japan		15,718		14,172		11,250
Total revenue	$	458,728	$	445,596	$	344,490