Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating expenses (income):
Research and development	$ 1,871	$ 15,389	$ 11,574	$ 32,402
General and administrative	3,844	4,518	8,838	9,930
Gain on disposal of assets, net	(57,245)		(57,245)
Total operating expenses (income)	(51,530)	21,046	(36,035)	44,951
Income (loss) from operations	51,530	(19,914)	36,829	(42,352)
Interest and other income (expense), net	102	(14)	267	(14)
Net income (loss)	$ 51,632	$ (19,928)	$ 37,096	$ (42,366)
Net income (loss) per share attributable to common stockholders, basic	$ 1.64	$ (0.64)	$ 1.18	$ (1.42)
Net income (loss) per share attributable to common stockholders, diluted	$ 1.64	$ (0.64)	$ 1.18	$ (1.42)
Shares used to compute net income (loss) per share attributable to common stockholders, basic	31,477,053	31,348,602	31,466,630	29,875,202
Shares used to compute net income (loss) per share attributable to common stockholders, diluted	31,482,925	31,348,602	31,469,566	29,875,202
Collaboration
Revenue:
License and collaboration revenue		$ 1,132	$ 794	$ 2,599
Cost of collaboration
Operating expenses (income):
Cost of license and collaboration		$ 1,139	$ 798	$ 2,619