Condensed Statements of Cash Flows (Unaudited) $ in Thousands	9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)
Cash flows from operating activities:
Net loss	$ (90,149)	$ (46,570)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	4,350	2,170
Amortization of premium on marketable securities	76	6
Stock-based compensation	8,280	1,902
Loss on write-offs and disposal of property and equipment	27	4
Non-cash operating lease expense	1,510	743
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(3,278)	(3,029)
Other noncurrent assets	(672)	(3,063)
Accounts payable	(1,803)	2,518
Accrued and other current liabilities	2,051	1,729
Operating lease liabilities	(2,147)	(952)
Other noncurrent liabilities	13	77
Net cash used in operating activities	(81,742)	(44,465)
Cash flows from investing activities:
Purchases of property and equipment	(19,835)	(12,567)
Purchases of marketable securities	(108,737)	(163,417)
Proceeds from maturities of marketable securities	206,250
Net cash provided by (used in) investing activities	77,678	(175,984)
Cash flows from financing activities:
Proceeds from initial public offering, net of issuance costs		188,605
Proceeds from exercise of stock options and employee stock purchase plan	281	343
Repurchase of common stock		(13)
Proceeds from repayments on notes receivable from stockholders		75
Net cash provided by financing activities	281	208,991
Net change in cash, cash equivalents and restricted cash	(3,783)	(11,458)
Cash and cash equivalents and restricted cash at beginning of period	38,676	129,082
Cash and cash equivalents and restricted cash at end of period	34,893	117,624
Components of cash, cash equivalents and restricted cash:
Cash and cash equivalents	34,494	117,077
Restricted cash included in other noncurrent assets	399	547
Cash, cash equivalents and restricted cash	34,893	117,624
Supplemental disclosure of non-cash investing and financing activities:
Conversion of convertible preferred stock to common stock upon completion of initial public offering		220,754
Offering costs related to initial public offering included in accounts payable and accrued and other current liabilities		64
Property and equipment included in accounts payable and accrued and other current liabilities	$ 263	3,677
Series C Convertible Preferred Stock
Cash flows from financing activities:
Proceeds from issuance of convertible preferred stock, net of issuance costs		$ 19,981