Unaudited Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Collaboration and other revenue		$ 250	$ 190	$ 250	$ 279
Operating expenses:
Research and development expense		14,850	2,923	25,273	4,584
General and administrative expense		15,860	1,787	24,234	1,324
Total operating expenses		30,710	4,710	49,507	5,908
Loss from operations		(30,460)	(4,520)	(49,257)	(5,629)
Other income (expense):
Interest income		80	1	178	6
Interest expense (includes related party amounts of $0 for the three and six months ended June 30, 2021 and $79 and $138 for the three and six months ended June 30, 2020, respectively)		(1)	(754)	(3)	(1,301)
Change in fair value of derivative liability		0	(775)	0	(728)
Extinguishment of convertible debt		0	(174)	(0)	(174)
Total other income (expense)		79	(1,702)	175	(2,197)
Consolidated net loss and comprehensive loss		$ (30,381)	$ (6,222)	$ (49,082)	$ (7,826)
Net loss per common share, basic and diluted	[1]	$ (0.90)		$ (1.46)
Weighted-average shares of common stock outstanding, basic and diluted	[1]	33,678,893		33,671,298

[1] For the three and six months ended June 30, 2020, the Company determined that the attribution of pre-Corporate Reorganization net losses based on the post-Corporate Reorganization capital structure would not meaningfully represent the economic rights of the unit holders. As a result, the Company presents net loss per share information only for the period subsequent to the Corporate Reorganization. (see Note 1).