Note 11 - Segment Reporting (Tables)

6 Months Ended

Jun. 30, 2017

Notes Tables

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

	Three Months Ended June 30,				Six Months Ended June 30,
(in thousands)	2017		2016		2017		2016
Revenue:
United States	$	63,353	$	55,323	$	123,529	$	109,791
Europe		16,131		17,276		33,130		32,907
Japan		2,556		2,362		5,548		4,831
Total revenue	$	82,040	$	74,961	$	162,207	$	147,529

Income from Operations by Geographic Area [Table Text Block]

	Three Months Ended June 30,						Six Months Ended June 30,
(in thousands)	2017			2016			2017			2016
Income from Operations:
United States	$	25,723		$	21,528		$	50,069		$	43,632
Europe		2,335			3,431			6,375			5,815
Corporate Unallocated and Japan		(11,656	)		(10,108	)		(22,360	)		(19,453	)
Total Income from Operations	$	16,402		$	14,851		$	34,084		$	29,994

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

	June 30,		December 31,
(in thousands)	2017		2016
Total long-lived assets:
United States	$	110,078	$	108,650
Europe		28,736		23,199
Japan		7,550		7,625
Total Assets	$	146,364	$	139,474