Segment Information (Tables)

3 Months Ended

Mar. 31, 2019

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 March 31, 2019 and 2018.

	Three Months Ended March 31, 2019
	U.S.		Japan		Germany		Brazil		Other Foreign Countries		Total
	(in thousands)
Metreleptin	$	11,434	$	39	$	3,232	$	—	$	3,274	$	17,979
Lomitapide	9,092		2,122		51		—		2,956		14,221
Total	$	20,526	$	2,161	$	3,283	$	—	$	6,230	$	32,200

	Three Months Ended March 31, 2018
	U.S.		Japan		Germany		Brazil		Other Foreign Countries		Total
	(in thousands)
Metreleptin	$	9,768	$	—	$	454	$	1,170	$	2,702	$	14,094
Lomitapide	8,624		1,852		32		—		2,882		13,390
Total	$	18,392	$	1,852	$	486	$	1,170	$	5,584	$	27,484