CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues:
Net product sales	$ 14,493	$ 14,634
Net product sales	us-gaap:ProductMember	us-gaap:ProductMember
Cost of goods sold	$ 6,389	$ 6,396
Cost of goods sold	us-gaap:ProductMember	us-gaap:ProductMember
Gross profit	$ 8,104	$ 8,238
Research and development expenses	2,035	3,197
Selling and marketing expenses	7,592	7,069
General and administrative expenses	4,365	3,793
Loss from operations	(5,888)	(5,821)
Interest expense	(2,037)	(2,115)
Other (expense) income, net	(25)	336
Net loss	$ (7,950)	$ (7,600)
Weighted average common shares outstanding used to compute net loss per share, basic and diluted	49,736,125	49,703,563
Net loss per share of common stock, basic and diluted	$ (0.16)	$ (0.15)