Condensed Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash flows from operating activities
Net loss	$ (56,617)	$ (15,762)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation, amortization and accretion	(249)	144
Reduction in the carrying amount of operating lease right of use assets	1,676	0
Stock-based compensation	6,139	2,050
Issuance of common stock for licensing payment	3,661	0
Restructuring payments	0	(875)
Gain on sale of PNAi technology	0	(2,691)
Change in fair value of non-marketable equity securities	745	645
Changes in operating assets and liabilities:
Prepaid expense and other current assets	(7,700)	(3,012)
Other assets	(98)	0
Accounts payable	5,627	55
Accrued and other current liabilities	2,291	2,176
Operating lease liabilities	(1,909)	0
Net cash used in operating activities	(46,434)	(17,270)
Cash flows from investing activities
Proceeds from sale of PNAi technology	0	796
Purchase of property and equipment	(62)	0
Purchase of marketable securities	(137,927)	0
Proceeds from maturities of marketable securities	54,000	0
Net cash (used in) provided by investing activities	(83,989)	796
Cash flows from financing activities
Proceeds from exercise of stock options and employee stock purchase plan	1,256	550
Proceeds from issuance of Class A common stock upon initial public offering, net of underwriting discounts and commissions	0	51,176
Proceeds from issuance of Class A common stock follow-on offering	86,132	0
Payment of costs related to initial public offering	0	(2,765)
Payment of costs and underwriting discounts and commissions related to follow-on offering	(6,164)	0
Net cash provided by financing activities	81,224	48,961
Net increase (decrease) in cash and cash equivalents and restricted cash	(49,199)	32,487
Cash, cash equivalents and restricted cash, beginning of period	79,967	53,997
Cash, cash equivalents and restricted cash, end of period	30,768	86,484
Supplemental disclosure of cash flow information
Cash paid for interest	336	0
Cash paid for operating leases	1,991	0
Issuance of common stock in payment of licensing fee	2,000	0
Reclassification of redeemable convertible preferred stock into Class A common stock and Class B common stock upon initial public offering	0	139,576
Non-marketable equity securities received as partial proceeds from sale of PNAi technology	0	1,759
Lease assignment	0	136
Cash and cash equivalents [Member]
Cash flows from financing activities
Cash, cash equivalents and restricted cash, end of period	30,475	86,191
Restricted cash [Member]
Cash flows from financing activities
Cash, cash equivalents and restricted cash, end of period	$ 293	$ 293