Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash flows from operating activities:
Net loss	$ (71,986)	$ (58,348)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization expense	640	599
Stock-based compensation expense	10,008	9,393
Amortization of operating leases, right-of-use assets	498	467
Net amortization (accretion) of premiums (discounts) on marketable securities	(955)	(1,396)
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	2,172	(1,102)
Other assets		(2)
Accounts payable	2,141	4,910
Accrued expenses and other current liabilities	(8,658)	(6,720)
Operating lease liability	(376)	(330)
Other liabilities	5
Net cash used in operating activities	(66,511)	(52,529)
Cash flows from investing activities:
Purchases of property and equipment	(547)	(70)
Purchases of marketable securities		(73,014)
Maturities and sales of marketable securities	69,926	74,128
Net cash provided by investing activities	69,379	1,044
Cash flows from financing activities:
Proceeds from issuance of common stock under ATM, net of issuance costs of $0.7 million	24,250
Proceeds from issuance of common stock and Series B Preferred Stock in connection with the Private Placement, net of offering costs $11.6 million		213,701
Proceeds from issuance of common stock upon stock option exercises	136	0
Proceeds from issuance of stock from employee stock purchase plan	584	356
Net cash provided by financing activities	24,970	214,057
Net increase in cash, cash equivalents and restricted cash	27,838	162,572
Cash, cash equivalents and restricted cash at beginning of period	98,165	53,229
Cash, cash equivalents and restricted cash at end of period	126,003	215,801
Supplemental disclosure of non-cash investing and financing information:
Offering costs included in accounts payable and accrued expenses	0	282
Property & equipment included in accounts payable and accrued expenses	79	$ 0
Series A Preferred Stock [Member]
Supplemental disclosure of non-cash investing and financing information:
Conversion of Series Preferred Stock into common shares	$ 2,435