Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue
Net product sales	$ 9,072	$ 5,706	$ 22,468	$ 15,804
Total revenue	9,072	5,706	22,468	15,804
Operating expenses
Cost of product sales	2,489	554	4,013	1,605
Research and development	3,617	21,182	21,581	64,469
Selling, general and administrative	12,493	10,782	29,322	34,425
Total operating expenses	18,599	32,518	54,916	100,499
Loss from operations	(9,527)	(26,812)	(32,448)	(84,695)
Other income (expense)
Interest expense	(2,526)	(2,863)	(7,402)	(8,398)
Interest income	12	501	234	1,818
Other income—related party			4,085
Other income (expense)	281		(412)
Total other income (expense), net	(2,233)	(2,362)	(3,495)	(6,580)
Net loss	$ (11,760)	$ (29,174)	$ (35,943)	$ (91,275)
Net loss per share, basic and diluted	$ (0.43)	$ (1.08)	$ (1.32)	$ (3.37)
Weighted-average common shares outstanding, basic and diluted	27,368	27,135	27,311	27,093