Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Operating expenses (income):
Research and development	$ 803	$ 20,352	$ 12,377	$ 52,754
General and administrative	4,363	4,869	13,201	14,799
Gain on disposal of assets, net			(57,245)
Total operating expenses (income)	5,166	27,528	(30,869)	72,479
Income (loss) from operations	(5,166)	(25,229)	31,663	(67,581)
Interest and other income (expense), net	282	(9)	549	(23)
Net income (loss)	$ (4,884)	$ (25,238)	$ 32,212	$ (67,604)
Net income (loss) per share attributable to common stockholders, basic	$ (0.16)	$ (0.80)	$ 1.02	$ (2.23)
Net income (loss) per share attributable to common stockholders, diluted	$ (0.16)	$ (0.80)	$ 1.02	$ (2.23)
Shares used to compute net income (loss) per share attributable to common stockholders, basic	31,484,542	31,379,755	31,472,666	30,382,231
Shares used to compute net income (loss) per share attributable to common stockholders, diluted	31,484,542	31,379,755	31,605,834	30,382,231
Cash dividends paid per common share	$ 1.43		$ 1.43
Collaboration
Revenue:
License and collaboration revenue		$ 2,299	$ 794	$ 4,898
Cost of collaboration
Operating expenses (income):
Cost of license and collaboration		$ 2,307	$ 798	$ 4,926