Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net loss	$ (59,453)	$ (28,308)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	2,263	1,424
Amortization of premium on marketable securities	253
Stock-based compensation	5,106	934
Loss on write-offs of property and equipment	28
Non-cash operating lease expense	795	434
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(438)	93
Other noncurrent assets	(132)	(2,954)
Accounts payable	(2,120)	1,363
Accrued and other current liabilities	711	(33)
Operating lease liabilities	(1,206)	(745)
Other noncurrent liabilities	7	(16)
Net cash used in operating activities	(54,186)	(27,808)
Cash flows from investing activities:
Purchases of property and equipment	(15,771)	(7,559)
Purchases of marketable securities	(65,135)
Proceeds from maturities of marketable securities	127,550
Net cash provided by (used in) investing activities	46,644	(7,559)
Cash flows from financing activities:
Proceeds from exercise of stock options and employee stock purchase plan	275	60
Repurchase of common stock		(10)
Proceeds from repayments on notes receivable from stockholders		75
Payment of deferred offering costs		(1,389)
Net cash provided by financing activities	275	18,717
Net change in cash, cash equivalents and restricted cash	(7,267)	(16,650)
Cash and cash equivalents and restricted cash at beginning of period	38,676	129,083
Cash and cash equivalents and restricted cash at end of period	31,409	112,433
Components of cash, cash equivalents and restricted cash:
Cash and cash equivalents	31,010	111,886
Restricted cash, noncurrent	399	547
Cash, cash equivalents and restricted cash	31,409	112,433
Supplemental disclosure of non-cash investing and financing activities:
Deferred offering costs related to initial public offering included in accounts payable and accrued and other current liabilities		1,094
Property and equipment included in accounts payable and accrued and other current liabilities	$ 3,060	1,954
Series C Convertible Preferred Stock
Cash flows from financing activities:
Proceeds from issuance of convertible preferred stock, net of issuance costs		$ 19,981