Unaudited Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Statement [Abstract]
Revenue	$ 8	$ 174
Operating expenses:
Research and development	7,680	12,450
General and administrative	2,884	3,967
Restructuring and other charges	28,289	0
Total operating expenses	38,853	16,417
Loss from operations	(38,845)	(16,243)
Other income (expense):
Interest and investment income	553	628
Interest expense	0	(1)
Change in fair value of purchase warrant liability	6,730	0
Other expense	(2)	(6)
Total other (expense), net	7,281	621
Net loss	$ (31,564)	$ (15,622)
Net loss per share - basic	$ (2.6)	$ (3.39)
Net loss per share - diluted	$ (2.6)	$ (3.39)
Weighted-average common stock outstanding - basic	12,131,461	4,604,682
Weighted-average common stock outstanding - diluted	12,131,461	4,604,682
Comprehensive loss:
Net loss	$ (31,564)	$ (15,622)
Net unrealized (loss) gain on marketable securities	(6)	131
Comprehensive loss	$ (31,570)	$ (15,491)