Segment Information (Tables)

9 Months Ended

Sep. 30, 2017

Segment Reporting [Abstract]

Schedule of Revenue by Geographic Region

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(in thousands)	2017		2016		2017		2016
Revenue
United States	$	18,396	$	20,292	$	58,251	$	57,587
International		24,324		21,274		69,409		60,867
Total	$	42,720	$	41,566	$	127,660	$	118,454