CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Costs and expenses:
Research and development	$ 23,516	$ 30,126	$ 47,603	$ 62,630
Selling, general and administrative	13,922	15,484	24,881	28,270
Total costs and expenses	37,438	45,610	72,484	90,900
Loss from continuing operations	(37,438)	(45,610)	(72,484)	(90,900)
Interest expense	(4,927)	(4,910)	(9,868)	(9,807)
Other income	670	333	1,163	751
Net loss from continuing operations	(41,695)	(50,187)	(81,189)	(99,956)
Net income from discontinued operations	10,846	21,594	17,329	36,273
Net loss	$ (30,849)	$ (28,593)	$ (63,860)	$ (63,683)
Basic net income (loss) per share continuing operations	$ (0.66)	$ (0.80)	$ (1.30)	$ (1.61)
Basic net income (loss) per share discontinued operations	0.17	0.34	0.28	0.59
Basic net income (loss) per share	(0.49)	(0.46)	(1.02)	(1.02)
Diluted net income (loss) per share continuing operations	(0.66)	(0.80)	(1.30)	(1.61)
Diluted net income (loss) per share discontinued operations	0.17	0.34	0.28	0.59
Diluted net income (loss) per share	$ (0.49)	$ (0.46)	$ (1.02)	$ (1.02)
Weighted-average shares used to compute basic net income (loss) per share (in shares)	62,730,015	62,373,521	62,727,395	62,154,714
Weighted-average shares used to compute diluted net income (loss) per share (in shares)	62,730,015	62,373,521	62,727,395	62,154,714