Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Total revenues	$ 7,090	$ 25,000	$ 7,152	$ 25,000
Cost and operating expenses:
Cost of sales	8	0	8	0
Research and development	46,081	34,811	97,469	70,600
Selling, general, and administrative	29,933	13,164	53,869	26,400
Total cost and operating expenses	76,022	47,975	151,346	97,000
Loss from operations	(68,932)	(22,975)	(144,194)	(72,000)
Other income (expense):
Interest and other income, net	1,691	1,540	4,146	3,194
Interest expense	0	(25)	0	(38)
Total other income (expense), net	1,691	1,515	4,146	3,156
Net loss	$ (67,241)	$ (21,460)	$ (140,048)	$ (68,844)
Net loss per share—basic and diluted (in dollars per share)	$ (1.20)	$ (0.56)	$ (2.56)	$ (1.81)
Weighted average common shares outstanding—basic and diluted (in shares)	55,920,122	38,200,288	54,743,778	38,129,049
Comprehensive loss:
Net loss	$ (67,241)	$ (21,460)	$ (140,048)	$ (68,844)
Other comprehensive income (loss):
Unrealized gains (losses) on marketable securities	(771)	154	(119)	175
Total other comprehensive income (loss)	(771)	154	(119)	175
Total comprehensive loss	(68,012)	(21,306)	(140,167)	(68,669)
Product revenues, net
Total revenues	4,825	0	4,825	0
Collaboration revenues
Total revenues	$ 2,265	$ 25,000	$ 2,327	$ 25,000