Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue:
Net product sales	$ 62,353	$ 44,130	$ 122,878	$ 78,176
Cost of goods sold	6,676	5,367	13,228	9,422
Gross profit	55,677	38,763	109,650	68,754
Operating expenses:
Research and development	69,611	70,981	158,731	135,574
Selling, general, and administrative	34,657	42,578	74,872	86,881
Changes in fair value of contingent consideration payable	715	480	1,646	1,863
Depreciation and amortization	2,039	1,154	3,803	2,145
Total operating expenses	107,022	115,193	239,052	226,463
Loss from operations	(51,345)	(76,430)	(129,402)	(157,709)
Other income (expense):
Interest income	865	2,599	2,380	5,238
Interest expense	(3,635)	(4,625)	(7,364)	(11,079)
Loss on exchange of convertible notes	0	(4,501)	0	(40,624)
Other income (expense)	5,326	(877)	(2,990)	209
Loss before income tax	(48,789)	(83,834)	(137,376)	(203,965)
Income tax expense	(3,703)	(717)	(4,064)	(885)
Net loss attributable to common stockholders	$ (52,492)	$ (84,551)	$ (141,440)	$ (204,850)
Net loss attributable to common stockholders per common share - basic and diluted (in dollars per share)	$ (0.20)	$ (0.36)	$ (0.55)	$ (0.91)
Weighted-average common shares outstanding - basic and diluted (in shares)	257,973,329	238,089,824	257,548,623	225,848,013