Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net loss	$ (14,961)	$ (7,250)
Non-cash adjustments to reconcile net loss to net cash provided by (used) in operating activities:
Stock-based compensation	2,250	264
Change in fair value of warrant liability	0	(1)
Depreciation and amortization	20	50
Amortization and accretion of short-term investments, net	(1,809)	0
Changes in operating assets and liabilities:
Prepaid and other assets	445	92
Accounts payable and accrued liabilities (including related party amounts of $291 and $55, respectively)	4,756	546
Operating right-of-use assets and lease liabilities, net	(3)	37
Contract liability	(3,127)	(663)
Net cash used in operating activities	(12,429)	(6,925)
Cash flows from investing activities:
Purchases of short-term investments, available-for-sale	(131,353)	0
Maturities of short-term investments, available-for-sale	20,000	0
Purchase of property and equipment	(193)	(21)
Net cash used in investing activities	(111,546)	(21)
Cash flows from financing activities:
Proceeds from exercise of common stock options	1,319	0
Repayment of bank note payable	0	(908)
Net cash provided by (used in) financing activities	1,319	(908)
Net change in cash and cash equivalents	(122,656)	(7,854)
Cash, cash equivalents, and restricted cash at beginning of period	210,518	60,063
Cash, cash equivalents, and restricted cash at end of period	87,862	52,209
Supplemental disclosure of cash flow information:
Purchases of property and equipment included in accounts payable	91	21
Purchases of property and equipment reclassed from prepaid expenses and other current assets	174	0
Interest paid	$ 0	$ 114