Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
License-related revenue	$ 0	$ 515	$ 30,000	$ 2,141
Operating expenses:
Research and development	18,198	12,669	34,822	23,213
General and administrative	6,426	6,434	12,967	12,076
Total operating expenses	24,624	19,103	47,789	35,289
Loss from operations	(24,624)	(18,588)	(17,789)	(33,148)
Interest expense	(733)	(416)	(1,415)	(1,440)
Other income (expense), net	144	23	190	46
Net loss	$ (25,213)	$ (18,981)	$ (19,014)	$ (34,542)
Net loss per share attributable to common stockholders— basic (in dollars per share)	$ (0.46)	$ (0.44)	$ (0.37)	$ (0.81)
Net loss per share attributable to common stockholders— diluted (in dollars per share)	$ (0.46)	$ (0.44)	$ (0.37)	$ (0.81)
Weighted average common shares outstanding— basic (in shares)	54,654,822	43,634,346	51,647,148	42,632,421
Weighted average common shares outstanding— diluted (in shares)	54,654,822	43,634,346	51,647,148	42,632,421
Comprehensive loss:
Net loss	$ (25,213)	$ (18,981)	$ (19,014)	$ (34,542)
Other comprehensive loss:
Unrealized loss on marketable securities, net of tax of $0	(259)	(8)	(949)	(9)
Comprehensive loss	$ (25,472)	$ (18,989)	$ (19,963)	$ (34,551)