Net Sales by Product (Tables)

12 Months Ended

Dec. 31, 2019

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,
	2019			2018			2017
BELBUCA	$	97,538		$	45,988		$	26,980
% of net product sales	90.4		%	89.5		%	77.3		%
Symproic	8,061			$	—		$	—
% of net product sales	7.5		%	—		%	—		%
BUNAVAIL	2,289			5,422			7,942
% of net product sales	2.1		%	10.5		%	22.7		%
Net product sales	$	107,888		$	51,410		$	34,922