Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating Activities
Net loss	$ (49,525)	$ (34,069)
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization of premium and accretion of discounts on marketable securities, net	(3,270)	(1,687)
Share-based compensation expense	8,512	6,838
Depreciation expense	234	206
Non-cash interest expense	122	115
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(2,189)	(2,109)
Accounts payable and accrued expenses	(3,128)	(5,364)
Operating lease right-of-use and other long-term assets	231	185
Other long-term liabilities	169	13
Net cash used in operating activities	(48,844)	(35,872)
Investing Activities
Purchases of marketable securities	(195,063)	(73,835)
Maturities of marketable securities	99,810	85,000
Purchases of property and equipment	(84)	(36)
Net cash (used in) provided by investing activities	(95,337)	11,129
Financing Activities
Proceeds from issuance of common stock and pre-funded warrants, net of offering costs	145,814
Proceeds from issuance of stock under equity plans	2,555
Net cash provided by financing activities	148,369
Net increase (decrease) in cash and cash equivalents	4,188	(24,743)
Cash and cash equivalents at beginning of period	37,318	51,802
Cash and cash equivalents at end of period	$ 41,506	$ 27,059