Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash flows from operating activities
Net loss	$ (34,272)	$ (63,169)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	6,951	12,586
Depreciation and amortization expense	104	104
Accretion of premium and discounts on marketable securities	(1,740)	(3,488)
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(638)	5,076
Other assets	(4,197)
Accounts payable	2,929	16,885
Accrued expenses and other liabilities	347	(7,815)
Operating lease liabilities	(47)	(44)
Net cash used in operating activities	(30,563)	(39,865)
Cash flows from investing activities
Purchases of marketable securities	(122,638)	(167,196)
Sales and maturities of marketable securities	208,246	223,998
Net cash provided by investing activities	85,608	56,802
Cash flows from financing activities
Proceeds from issuance of common stock under ESPP	138	150
Issuance of restricted stock units, net of employee tax obligations	(485)
Net cash (used in) provided by financing activities	(347)	150
Net increase in cash and cash equivalents	54,698	17,087
Cash and cash equivalents at the beginning of period	64,696	143,823
Cash and cash equivalents at the end of period	$ 119,394	$ 160,910