CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net loss			$ (41,136)	$ (22,238)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	$ 100	$ 100	387	239
Stock-based compensation expense			8,560	540
Non-cash lease expense			584	543
Net amortization of premiums and accretion of discounts on investments			(2,643)	(182)
Changes in operating assets and liabilities:
Prepaid expenses and other current assets			1,942	(1,044)
Accounts payable			439	482
Accrued expenses and other liabilities			2,133	1,388
Operating lease liabilities			(541)	(491)
Net cash used in operating activities			(30,275)	(20,763)
Cash flows from investing activities:
Purchases of short-term and long-term investments			(39,947)	(49,367)
Proceeds from maturities of short-term investments			70,265	4,673
Purchases of property and equipment			(137)	(1,915)
Net cash provided by (used in) investing activities			30,181	(46,609)
Cash flows from financing activities:
Proceeds from exercise of stock options			457	24
Payments of deferred offering costs				(175)
Net cash provided by (used in) financing activities			457	(151)
Net increase (decrease) in cash, cash equivalents, and restricted cash			363	(67,523)
Cash, cash equivalents and restricted cash at beginning of period			29,907	99,991
Cash, cash equivalents and restricted cash at end of period	30,270	32,468	30,270	32,468
Supplemental disclosure of non-cash investing and financing activities:
Purchases of property and equipment included in accounts payable and accrued expenses			161	185
Deferred offering costs in accounts payable and accrued expenses				1,369
Reconciliation of cash, cash equivalents, and restricted cash:
Cash and cash equivalents	29,859	32,080	29,859	32,080
Restricted cash	411	388	411	388
Total cash, cash equivalents, and restricted cash	$ 30,270	$ 32,468	$ 30,270	$ 32,468