Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net loss	$ (99,652)	$ (67,229)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	10,167	7,688
Net accretion of discounts on investments in marketable securities	(5,406)	(2,188)
Amortization of debt discount and accretion of deferred debt costs	330	456
Loss on extinguishment of debt		1,208
Noncash operating lease expense	351	83
Depreciation	21	24
Other	113
Changes in operating assets and liabilities:
Prepaid and other assets	(14,319)	(5,816)
Accounts payable	9,002	(1,787)
Accrued expenses	(1,410)	3,112
Operating lease liabilities	(91)	(83)
Other noncurrent liabilities	10
Net cash used in operating activities	(100,884)	(64,532)
Cash flows from investing activities:
Proceeds from sales and maturities of marketable securities	178,090	82,880
Purchases of marketable securities	(230,139)	(180,582)
Net cash used in investing activities	(52,049)	(97,702)
Cash flows from financing activities:
Proceeds from issuance of common stock in public offerings, net of issuance costs		296,817
Payments of deferred offering costs	(116)
Proceeds from issuance of common stock in at-the-market public offerings, net of issuance costs	21,049	37,089
Proceeds from term loan facility, net of issuance costs		24,363
Proceeds from issuance of common stock upon exercise of common stock warrants	29,543	15,590
Proceeds from issuance of common stock upon exercise of stock options	61	512
Proceeds from issuance of common stock under employee stock purchase plan	178	142
Payments for taxes related to net share settlement upon vesting of restricted stock units	(1,725)	(693)
Repayment of term loan		(21,400)
Net cash provided by financing activities	48,990	352,420
Net change in cash and cash equivalents	(103,943)	190,186
Cash and cash equivalents at beginning of period	316,161	55,255
Cash and cash equivalents at end of period	212,218	245,441
Supplemental disclosures of cash information:
Cash paid for interest	1,368	1,198
Cash paid for amounts included in the measurement of lease liabilities	$ 239	93
Supplemental disclosures of noncash information:
Issuance of common stock warrants in connection with term loan		$ 482