Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Operating Activities
Net loss	$ (29,262)	$ (39,061)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation expense	468	420
Non-cash operating lease expense	766	999
Stock-based compensation expense	3,169	5,022
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	1,232	(333)
Other assets	2	(1,236)
Accounts payable	(5,220)	(2,176)
Accrued expenses and other current liabilities	4,022	3,836
Operating lease liabilities	(844)	499
Net cash used in operating activities	(25,667)	(32,030)
Investing Activities
Purchase of property and equipment	0	(35)
Net cash used in investing activities	0	(35)
Financing Activities
Proceeds from issuances of common stock under ATM program	3,257	0
Payments of financing costs	(5)	0
Proceeds from stock option exercise	0	116
Net cash provided by financing activities	3,252	116
Net decrease in cash, cash equivalents, and restricted cash	(22,415)	(31,949)
Cash, cash equivalents, and restricted cash at the beginning of the period	58,648	177,236
Cash, cash equivalents, and restricted cash at the end of the period	36,233	145,287
Non-cash financing and investing activities:
Acquisition of property and equipment in accounts payable and accrued liabilities	0	34
Financing costs included in accounts payable	5	0
Reconciliation of cash and cash equivalents, and restricted cash:
Cash and cash equivalents	35,864	144,918
Restricted cash	369	369
Cash, cash equivalents, and restricted cash at the end of the period	$ 36,233	$ 145,287