Note 17 - Segment Reporting (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Income from Operations by Geographic Area [Table Text Block]

	Year Ended December 31,
(in thousands)	2020			2019			2018
Income from Operations:
United States	$	98,762		$	108,594		$	115,710
Europe		11,707			15,077			16,747
Corporate Unallocated and Japan		(50,633	)		(43,815	)		(43,557	)
Total income from operations	$	59,836		$	79,856		$	88,898

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

	December 31,		December 31,		December 31,
(in thousands)	2020		2019		2018
Long-lived assets:
United States	$	215,721	$	210,171	$	185,979
Europe		59,388		45,019		34,577
Japan		7,557		8,522		7,445
Total long-lived assets	$	282,666	$	263,712	$	228,001

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

	Year Ended December 31,
(in thousands)	2020		2019		2018
Expenditures for additions to long-lived assets:
United States	$	29,984	$	45,123	$	78,762
Europe		16,574		14,743		7,576
Japan		452		2,364		766
Total expenditures for additions to long-lived assets	$	47,010	$	62,230	$	87,104

Depreciation and Amortization by Geographic Region [Table Text Block]

	Year Ended December 31,
(in thousands)	2020		2019		2018
Depreciation and Amortization:
United States	$	25,744	$	24,767	$	21,117
Europe		5,024		4,746		4,679
Japan		1,826		1,351		958
Total depreciation and amortization	$	32,594	$	30,864	$	26,754

Operating Segments [Member]

Notes Tables

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

	Year Ended December 31,
(in thousands)	2020		2019		2018
Revenue:
United States	$	345,708	$	360,205	$	350,535
Europe		74,796		82,805		80,889
Japan		13,891		15,718		14,172
Total revenue	$	434,395	$	458,728	$	445,596