Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Net revenues	$ 28,669	$ 0	$ 99,530	$ 0
Cost of product sales	29,505	0	60,227	0
Operating expenses
Selling, general and administrative	21,395	3,162	72,360	13,572
Research and development	17,112	2,855	37,236	8,774
Restructuring charges	56	0	2,541	0
Total operating expenses	38,563	6,017	112,137	22,346
Loss from operations	(39,399)	(6,017)	(72,834)	(22,346)
Interest (expense) income, net	(9,897)	110	(28,722)	240
Fair value gain (loss) on investment	0	0	0	(10,704)
Other income (expense), net	49	(144)	176	(244)
Loss before provision for income taxes	(49,247)	(6,051)	(101,380)	(33,054)
(Provision for) recovery of income taxes	(497)	115	(762)	104
Net loss	$ (49,744)	$ (5,936)	$ (102,142)	$ (32,950)
Net loss per common share—basic and diluted (in usd per share)	$ (2.67)	$ (0.56)	$ (5.49)	$ (3.12)
Weighted-average shares outstanding—basic and diluted (in shares)	18,648	10,565	18,599	10,565