Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Operating Activities
Net loss			$ (76,337)	$ (53,942)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation expense	$ 400	$ 400	843	676
Non-cash operating lease expense			1,376	1,285
Stock-based compensation expense			9,862	6,669
Net amortization of premiums and accretion of discounts on investments				1
Changes in operating assets and liabilities:
Prepaid expenses and other current assets			(687)	1,742
Other assets			(1,244)	(761)
Accounts payable			(1,058)	(163)
Accrued expenses and other current liabilities.			2,503	(4,171)
Operating lease liabilities			69	(1,192)
Net cash used in operating activities			(64,673)	(49,856)
Investing Activities
Purchase of property and equipment			(94)	(3,323)
Maturities of investments				1,150
Net cash used in investing activities			(94)	(2,173)
Financing Activities
Proceeds from issuance of common stock from public offering, net of offering costs				161,803
Proceeds from stock option exercise and purchases under the employee stock purchase plan			1,186	1,235
Net cash provided by financing activities			1,186	163,038
Net (decrease) increase in cash, cash equivalents, and restricted cash			(63,581)	111,009
Cash, cash equivalents, and restricted cash at the beginning of the period			177,236	112,250
Cash, cash equivalents, and restricted cash at the end of the period	113,655	223,259	113,655	223,259
Non-cash financing and investing activities:
Acquisition of operating lease right-of-use assets				11,639
Acquisition of property and equipment in accounts payable and accrued liabilities			35	28
Reconciliation of cash and cash equivalents and restricted cash:
Cash and cash equivalents	113,286	222,908	113,286	222,908
Restricted cash	369	351	369	351
Cash, cash equivalents, and restricted cash at the end of the period	$ 113,655	$ 223,259	$ 113,655	$ 223,259