Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Operating activities
Net loss	$ (84,616)	$ (59,146)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	517	489
Stock-based compensation	11,866	3,329
Non-cash research and development expenses		20,000
Non-cash lease expense	855	448
Non-cash loss from equity method investment in joint venture		50
Changes in fair value of derivative liability		(5,821)
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(332)	(836)
Accounts payable	(6,443)	610
Accrued expenses and other current liabilities	5,636	3,164
Operating lease liabilities	569	(455)
Derivative liability		3,369
Net cash used in operating activities	(71,948)	(23,157)
Investing activities
Purchase of property and equipment	(4,541)	(540)
Investment in joint venture		(50)
Net cash used in investing activities	(4,541)	(590)
Financing activities
Proceeds from issuance of Series B convertible preferred stock, net of issuance costs		151,581
Deferred offering costs		(2,451)
Proceeds from the exercise of stock options	183	14
Net cash provided by financing activities	183	149,144
Net (decrease) increase in cash, cash equivalents, and restricted cash	(76,306)	125,397
Cash, cash equivalents and restricted cash at beginning of year	276,316	8,189
Cash, cash equivalents and restricted cash at end of year	200,010	133,586
Supplemental cash flow information:
Cash received for interest	892	16
Supplemental schedule of noncash investing and financing activities:
Property and equipment in accounts payable and accrued expenses	1,360
Deferred offering costs in accounts payable and accrued expenses		1,050
Operating lease right-of-use asset obtained in exchange for operating lease liabilities	15,319
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	198,538	133,477
Restricted cash	1,472	109
Total cash, cash equivalents and restricted cash shown in the statement of cash flows	$ 200,010	$ 133,586