Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue:
Total revenue		$ 3,000		$ 3,000
Type of Revenue [Extensible List]		us-gaap:LicenseMember		us-gaap:LicenseMember
Operating expenses:
Research and development	$ 7,758	$ 12,820	$ 17,324	$ 28,159
General and administrative	3,618	4,487	7,878	9,915
Total operating expenses	11,376	17,307	25,202	38,074
Loss from operations	(11,376)	(14,307)	(25,202)	(35,074)
Other income (expense):
Transaction costs allocable to warrant liabilities	(475)		(475)
Change in fair value of warrant liabilities	2,706		2,706
Interest and other income (expense), net	68	(4)	59	368
Other income (expense), net	2,299	(4)	2,290	368
Net loss	(9,077)	(14,311)	(22,912)	(34,706)
Deemed contribution from Series A preferred stock extinguishment	18,360		18,360
Adjustment to allocate undistributed earnings to participating security	(1,362)
Net income (loss) attributable to common stockholders - basic	$ 7,921	$ (14,311)	$ (4,552)	$ (34,706)
Net income (loss) per share, attributable to common stockholders - basic	$ 1.63	$ (3.86)	$ (1.04)	$ (9.49)
Net loss per share attributable to common stockholders - diluted	$ (1.59)	$ (3.86)	$ (4.48)	$ (9.49)
Weighted average common shares used to compute net income (loss) per share, attributable to common stockholders - basic	4,863	3,703	4,396	3,658
Weighted average common shares used to compute net loss per share, attributable to common stockholders - diluted	5,699	3,703	5,120	3,658