Segment Reporting (Tables)

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

Summary of Net Sales by Product

The following table presents net sales by product for each of the years ended December 31 (in thousands):

	Year ended December 31,
	2017		2016		2015
BELBUCA®	$	26,980	$	—	$	—
BUNAVAIL®		7,942		8,266		4,157
Net product sales	$	34,922	$	8,266	$	4,157