Product Revenue, Net (Tables)

6 Months Ended

Jun. 30, 2019

Product Revenue, Net [Abstract]

Product Revenues

The table below summarizes consolidated product revenue, net by region:

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
	(in thousands)				(in thousands)
Product revenue, net:
U.S.	$	50,691	$	34,500	$	88,682	$	63,013
ex-U.S.		15,203		8,669		29,059		15,314
Total product revenue, net	$	65,894	$	43,169	$	117,741	$	78,327