Segment Information (Tables)

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Schedule of Net Product Sales from External Customers

The following table summarizes total net revenues from external customers by product and by geographic region, based on the location of the customer, for the three months ended June 30, 2018 and 2017.

	Three Months Ended June 30,
	2018								2017
	U.S.		Brazil		Other Foreign Countries		Total		U.S.		Brazil		Other Foreign Countries		Total
	(in thousands)								(in thousands)
Lomitapide	$	10,477	$	—	$	5,795	$	16,272	$	11,056	$	4,299	$	5,358	$	20,713
Metreleptin	12,481		—		3,151		15,632		14,867		3,759		1,538		20,164
Total	$	22,958	$	—	$	8,946	$	31,904	$	25,923	$	8,058	$	6,896	$	40,877

The following table summarizes total net revenues from external customers by product and by geographic region, based on the location of the customer, for the six months ended June 30, 2018 and 2017.

	Six Months Ended June 30,
	2018								2017
	U.S.		Brazil		Other Foreign Countries		Total		U.S.		Brazil		Other Foreign Countries		Total
	(in thousands)								(in thousands)
Lomitapide	$	19,100	$	—	$	10,537	$	29,637	$	21,932	$	5,939	$	8,866	$	36,737
Metreleptin	22,248		1,170		6,333		29,751		26,341		4,986		2,797		34,124
Total	$	41,348	$	1,170	$	16,870	$	59,388	$	48,273	$	10,925	$	11,663	$	70,861