Condensed Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities
Net loss	$ (89,056)	$ (32,609)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation, amortization and accretion	(846)	176
Reduction in the carrying amount of operating lease right of use assets	2,271	0
Stock-based compensation	8,887	3,012
Issuance of Class A common stock for licensing payment, net of costs	3,592	0
Payment for MAU868 asset purchase	0	5,000
Restructuring payments	0	(999)
Gain on sale of PNAi technology	0	(2,691)
Change in fair value of non-marketable equity securities	809	892
Changes in operating assets and liabilities:
Prepaid expense and other current assets	(8,182)	(2,306)
Other assets	(111)	(51)
Accounts payable	10,606	475
Accrued and other current liabilities	7,036	5,393
Operating lease liabilities	(2,602)	0
Net cash used in operating activities	(67,596)	(23,708)
Cash flows from investing activities
Proceeds from sale of PNAi technology	0	796
Payment for MAU868 asset purchase	0	(5,000)
Purchase of property and equipment	(62)	0
Purchase of marketable securities	(148,490)	0
Proceeds from maturities of marketable securities	78,000	0
Net cash used in investing activities	(70,552)	(4,204)
Cash flows from financing activities
Proceeds from exercise of stock options and employee stock purchase plan	2,083	550
Proceeds from issuance of Class A common stock upon initial public offering, net of underwriting discounts and commissions	0	51,176
Proceeds from borrowings, net of costs	19,816	4,921
Payment of offering costs related to initial public offering	0	(2,765)
Proceeds from issuance of Class A common stock in follow-on offering	86,131	0
Payment of costs and underwriting discounts and commissions related to follow-on offering	(6,097)	0
Net cash provided by financing activities	101,933	53,882
Net (decrease) increase in cash and cash equivalents and restricted cash	(36,215)	25,970
Cash, cash equivalents and restricted cash, beginning of year	79,967	53,997
Cash, cash equivalents and restricted cash, end of year	43,752	79,967
Supplemental disclosure of cash flow information
Cash paid for interest	895	17
Cash paid for operating leases	2,734	0
Issuance of Class A common stock in payment of licensing fees	2,000	0
Reclassification of redeemable convertible preferred stock into 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
Liability assumed in connection with MAU868 asset purchase	0	2,000
Cash and cash equivalents [Member]
Cash flows from financing activities
Cash, cash equivalents and restricted cash, beginning of year	79,674
Cash, cash equivalents and restricted cash, end of year	43,459	79,674
Restricted cash [Member]
Cash flows from financing activities
Cash, cash equivalents and restricted cash, beginning of year	293
Cash, cash equivalents and restricted cash, end of year	$ 293	$ 293