Segment Information (Tables)

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

Schedule of Long-Lived Assets by Location

The following table presents total long-lived assets by location:

	DECEMBER 31,
(in thousands)	2017		2016
United States	$	6,609	$	5,161
Ireland	25,323		2,696
Total long-lived assets	$	31,932	$	7,857