CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Operating expenses:
Research and development	$ 49,166	$ 25,922	$ 87,800	$ 48,047
General and administrative	15,984	8,140	29,938	16,225
Total operating expenses	65,150	34,062	117,738	64,272
Loss from operations	(65,150)	(34,062)	(117,738)	(64,272)
Other income (expense)
Interest income and other income (expense), net	8,154	4,972	16,643	9,990
Total other income (expense), net	8,154	4,972	16,643	9,990
Loss before income taxes	(56,996)	(29,090)	(101,095)	(54,282)
Income tax provision	170		553
Net loss	$ (57,166)	$ (29,090)	$ (101,648)	$ (54,282)
Net loss per share attributable to Class A and Class B common stockholders, basic	$ (0.88)	$ (0.51)	$ (1.58)	$ (0.96)
Net loss per share attributable to Class A and Class B common stockholders, diluted	$ (0.88)	$ (0.51)	$ (1.58)	$ (0.96)
Weighted average shares of Class A and Class B common stock outstanding, basic	64,605,308	56,866,991	64,377,948	56,785,883
Weighted average shares of Class A and Class B common stock outstanding, diluted	64,605,308	56,866,991	64,377,948	56,785,883
Comprehensive loss:
Net loss	$ (57,166)	$ (29,090)	$ (101,648)	$ (54,282)
Other comprehensive loss
Unrealized losses on marketable securities	(253)	(1,235)	(1,602)	(1,043)
Comprehensive loss	$ (57,419)	$ (30,325)	$ (103,250)	$ (55,325)