Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenue
Net product sales	$ 33,419	$ 23,054
Total revenue	33,419	23,054
Operating expenses
Cost of product sales	7,819	2,392
Selling, general and administrative	38,428	45,134
Research and development	23,010	85,329
Total operating expenses	69,257	132,855
Loss from operations	(35,838)	(109,801)
Other income (expense)
Interest expense	(10,051)	(10,774)
Interest income	235	2,128
Other income—related party	6,279	1,939
Other income (expense)	(46)
Total other income (expense), net	(3,583)	(6,707)
Net loss	$ (39,421)	$ (116,508)
Net loss per share, basic and diluted	$ (1.44)	$ (4.30)
Weighted-average common shares outstanding, basic and diluted	27,329	27,112