Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Operating Activities
Net loss			$ (82,371)	$ (56,514)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation expense	$ 400	$ 200	1,095	510
Non-cash operating lease expense			1,976	426
Stock-based compensation expense			10,267	7,620
Net amortization of premiums and accretion of discounts on investments			1	136
Changes in operating assets and liabilities:
Prepaid expenses and other current assets			1,356	(2,358)
Other assets			(1,684)	747
Accounts payable			(1,099)	(13)
Accrued expenses and other current liabilities.			(1,466)	7,649
Operating lease liabilities			(1,830)	(419)
Net cash used in operating activities			(73,755)	(42,216)
Investing Activities
Purchase of property and equipment			(3,362)	(318)
Maturities of investments			1,150	28,360
Net cash provided by (used in) investing activities			(2,212)	28,042
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			1,373	749
Net cash provided by financing activities			163,176	749
Net increase (decrease) in cash, cash equivalents, and restricted cash			87,209	(13,425)
Cash, cash equivalents, and restricted cash at the beginning of the period			112,250	146,087
Cash, cash equivalents, and restricted cash at the end of the period	199,459	132,662	199,459	132,662
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			4	276
Reconciliation of cash and cash equivalents and restricted cash:
Cash and cash equivalents	199,090	132,311	199,090	132,311
Restricted cash	369	351	369	351
Cash, cash equivalents, and restricted cash at the end of the period	$ 199,459	$ 132,662	$ 199,459	$ 132,662