CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Net loss	$ (16,645)	$ (15,460)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	5,527	1,609
Depreciation expense	10	0
Noncash operating lease expense	230	0
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	1,725	274
Other assets	311	0
Accounts payable	(744)	365
Accrued expenses and other current liabilities	(994)	(1,640)
Changes in operating lease liabilities	(55)	0
Net cash used in operating activities	(10,635)	(14,852)
Cash flows from investing activities:
Purchase of property and equipment	(168)	0
Net cash used in investing activities	(168)	0
Cash flows from financing activities:
Payment of offering costs	0	(697)
Proceeds from the exercise of stock options	58	0
Net cash provided by (used in) financing activities	58	(697)
Net decrease in cash, cash equivalents and restricted cash	(10,745)	(15,549)
Cash, cash equivalents and restricted cash at beginning of period	289,318	128,280
Cash, cash equivalents and restricted cash at end of period	278,573	112,731
Supplemental disclosure of cash flows:
Offering costs in accounts payable and accrued expenses	$ 0	$ 393