Unaudited Condensed Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities
Net loss	$ (19,256)	$ (5,129)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	49	4
Loss on disposal of assets	3	0
Stock-based compensation	3,966	32
Noncash interest – related parties	0	206
Amortization (accretion) of premiums/discounts on investments, net	(114)	0
Increase in fair value of convertible promissory notes – related parties	0	1,735
Changes in operating assets and liabilities:
Accounts receivable	8,000	0
Prepaid expenses and other current assets (includes related party amounts of $14 and $0, respectively)	(1,832)	0
Other long-term assets	(140)	0
Accounts payable (includes related party amounts of $0 and $50, respectively)	2,621	212
Accrued expenses (includes related party amounts of $(544) and $195, respectively)	1,107	200
Deferred revenue	(896)	0
Operating lease right-of-use assets and liabilities, net	(3)	0
Net cash used in operating activities	(6,495)	(2,740)
Cash flows from investing activities
Purchases of property and equipment	(309)	0
Purchases of short-term investments	(370,125)	0
Maturities of short-term investments	22,145	0
Net cash used in investing activities	(348,289)	0
Cash flows from financing activities
Proceeds from issuance of convertible promissory notes	0	2,500
Proceeds from exercise of vested and unvested common stock options	1,646	4
Proceeds from initial public offering, net of issuance costs	204,167	0
Net cash provided by financing activities	386,360	6,971
Net increase in cash and cash equivalents	31,576	4,231
Cash and cash equivalents – beginning of period	7,813	658
Cash and cash equivalents – end of period	39,389	4,889
Supplemental disclosure of noncash investing and financing activities
Conversion of convertible preferred stock in connection with initial public offering	202,171	0
Conversion of convertible promissory notes and accrued interest into shares of convertible preferred stock	0	8,674
Unpaid fixed asset additions	853	146
Vesting of restricted common stock	326	0
Unpaid equity issuance costs	30	6
Unrealized gain (loss) on short-term investments	24	0
Operating lease liabilities arising from right-of-use assets	256
Series Seed 2 Convertible Preferred Stock [Member]
Cash flows from financing activities
Proceeds from issuance of convertible preferred stock, net of issuance costs	0	4,467
Series A Convertible Preferred Stock [Member]
Cash flows from financing activities
Proceeds from issuance of convertible preferred stock, net of issuance costs	55,722	0
Series B Convertible Preferred Stock [Member]
Cash flows from financing activities
Proceeds from issuance of convertible preferred stock, net of issuance costs	$ 124,825	$ 0