CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues
Product revenues, net	$ 72,942	$ 70,176	$ 222,498	$ 206,986
Costs and expenses
Cost of product revenues	46,754	46,007	144,572	135,951
Research and development	2,491	1,907	7,942	6,412
Selling, general and administrative	30,072	33,448	91,359	96,309
Total costs and expenses	79,317	81,362	243,873	238,672
Loss from operations	(6,375)	(11,186)	(21,375)	(31,686)
Interest expense	(228)	(5,868)	(698)	(17,726)
Interest income	494	552	1,552	1,198
Net loss	$ (6,109)	$ (16,502)	$ (20,521)	$ (48,214)
Loss per share - basic and diluted	$ (0.18)	$ (0.50)	$ (0.62)	$ (1.46)
Weighted-average shares - basic and diluted	33,481,923	33,012,174	33,360,272	32,950,584