Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities
Net loss	$ (63,059)	$ (32,672)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	841	113
Loss on disposal of assets	0	3
Stock-based compensation	17,203	6,910
Amortization (accretion) of premiums/discounts on investments, net	(2,183)	(172)
Changes in operating assets and liabilities:
Accounts receivable	0	8,000
Prepaid expenses and other current assets	(3,369)	(1,805)
Other long-term assets	(1,270)	(392)
Accounts payable	(294)	2,139
Accrued expenses (includes related party amounts of $(25) and $(512), respectively)	4,156	3,028
Deferred revenue	1,764	(2,137)
Operating lease right-of-use assets and liabilities, net	3,289	9
Net cash used in operating activities	(42,922)	(16,976)
Cash flows from investing activities
Purchases of property and equipment	(6,445)	(1,482)
Purchases of short-term investments	(294,389)	(473,626)
Maturities of short-term investments	359,100	134,145
Net cash provided by (used in) investing activities	58,266	(340,963)
Cash flows from financing activities
Proceeds from exercise of vested and unvested common stock options and employee stock purchase plan	500	1,810
Proceeds from initial public offering, net of issuance costs	0	204,167
Net cash provided by financing activities	500	386,524
Net increase in cash, cash equivalents and restricted cash	15,844	28,585
Cash, cash equivalents and restricted cash - beginning of year	36,398	7,813
Cash, cash equivalents and restricted cash - end of year	52,242	36,398
Supplemental disclosure of noncash investing and financing activities
Conversion of convertible preferred stock to common stock in connection with initial public offering, converted	0	202,171
Unpaid property and equipment	109	38
Vesting of restricted common stock	1,034	475
Unrealized loss on available-for-sale securities, net	(1,265)	(270)
Operating lease liabilities arising from right-of-use assets	23,422	256
Series A Convertible Preferred Stock [Member]
Cash flows from financing activities
Proceeds from issuance of convertible preferred stock, net of issuance costs	0	55,722
Series B Convertible Preferred Stock [Member]
Cash flows from financing activities
Proceeds from issuance of convertible preferred stock, net of issuance costs	$ 0	$ 124,825