Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net loss	$ (117,298)	$ (82,663)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization expense	1,205	1,091
Stock-based compensation expense	19,405	13,013
Amortization of operating leases, right-of-use assets	941	848
Change in fair value of CVR liability	0	(1,700)
Net amortization (accretion) of premiums (discounts) on marketable securities	1,185	(1,780)
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(1,694)	(685)
Other assets	(2)	(30)
Accounts payable	(1,680)	1,319
Accrued expenses and other current liabilities	3,377	(708)
Operating lease liability	(669)	(288)
Net cash used in operating activities	(95,230)	(71,583)
Cash flows from investing activities:
Purchases of property and equipment	(218)	(2,360)
Purchases of marketable securities	(223,411)	(185,417)
Maturities and sales of marketable securities	140,048	170,000
Net cash used in investing activities	(83,581)	(17,777)
Cash flows from financing activities:
Proceeds from issuance of common stock and Series B Preferred Stock in connection with the Private Placement, net of offering costs $11.6 million	213,336	0
Proceeds from issuance of shares of common stock, net of offering costs of $10.7 million	0	161,989
Proceeds from issuance of stock from employee stock purchase plan	356	313
Proceeds from issuance of common stock upon stock option exercises	109	234
Net cash provided by financing activities	213,801	162,536
Net increase in cash, cash equivalents and restricted cash	34,990	73,176
Cash, cash equivalents and restricted cash at beginning of period	53,229	141,141
Cash, cash equivalents and restricted cash at end of period	88,219	214,317
Supplemental disclosure of noncash investing and financing information:
Offering costs included in accounts payable and accrued expenses	49	200
Property & equipment included in accounts payable and accrued expenses	0	43
Series A Preferred Stock [Member]
Supplemental disclosure of noncash investing and financing information:
Conversion of Series Preferred Stock into common shares	0	3,520
Series B Preferred Stock [Member]
Supplemental disclosure of noncash investing and financing information:
Conversion of Series Preferred Stock into common shares	$ 107,980	$ 0