CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net loss	$ (18,563)	$ (16,645)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	4,831	5,527
Depreciation expense	24	10
Noncash operating lease expense	353	230
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(2,522)	1,725
Other assets	310	311
Accounts payable	(399)	(744)
Accrued expenses and other current liabilities	1,227	(994)
Operating lease liabilities	(361)	(55)
Net cash used in operating activities	(15,100)	(10,635)
Cash flows from investing activities:
Purchase of property and equipment	0	(168)
Net cash used in investing activities	0	(168)
Cash flows from financing activities:
Proceeds from the exercise of stock options	1,361	58
Net cash provided by financing activities	1,361	58
Net decrease in cash, cash equivalents and restricted cash	(13,739)	(10,745)
Cash, cash equivalents and restricted cash at beginning of period	269,523	289,318
Cash, cash equivalents and restricted cash at end of period	255,784	278,573
Supplemental disclosure of cash flows:
Offering costs in accounts payable and accrued expenses	$ 50	$ 0