Segment Information (Tables)

9 Months Ended

Sep. 30, 2017

Segment Information

Summary of total revenue from customers by geographic region

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
	(In thousands)				(In thousands)
United States	$	70,881	$	70,163	$	213,878	$	210,302
Outside of the United States		12,940		12,095		39,409		34,824
Total revenues	$	83,821	$	82,258	$	253,287	$	245,126