Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Income Statement [Abstract]
Collaboration revenue	$ 2,805	$ 6,342
Operating expenses:
Research and development	71,801	76,782
General and administrative	41,668	41,694
Restructuring expenses	0	427
Total operating expenses	113,469	118,903
Loss from operations	(110,664)	(112,561)
Other income, net	13,329	2,690
Net loss	$ (97,335)	$ (109,871)
Earnings Per Share, Basic	$ (1.59)	$ (2.44)
Earnings Per Share, Diluted	$ (1.59)	$ (2.44)
Weighted Average Number of Shares Outstanding, Diluted	61,310	44,991
Weighted Average Number of Shares Outstanding, Basic	61,310	44,991
Comprehensive loss:
Net loss	$ (97,335)	$ (109,871)
Other comprehensive loss:
Unrealized loss on marketable securities	661	(400)
Total other comprehensive loss	661	(400)
Comprehensive loss	$ (96,674)	$ (110,271)