Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net loss	$ (617,179)	$ (143,297)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	90,880	9,325
Accretion of asset retirement obligations	0	27
Depreciation and amortization	6,768	5,611
Loss on disposal of property and equipment	0	127
Non-cash research and development expense	0	32,325
Change in fair value of warrants liability	326,900	970
Gain on loan extinguishment	(4,183)	0
Change in fair value of related party convertible loan	0	11,849
Changes in operating assets and liabilities:
Accounts receivable	(560)	(298)
Prepaid expenses and other current assets	(12,114)	1,251
Other assets	(659)	(339)
Accounts payable	(313)	1,359
Amounts due to/from related parties	0	(274)
Amounts due to joint development partners	5,642	0
Accrued expenses and other current liabilities	16,488	15,317
Other liabilities	1,965	1,263
Net cash used in operating activities	(186,365)	(64,784)
Cash flows from investing activities:
Purchases of property and equipment	(12,218)	(2,881)
Purchases of intangible assets	(302)	(207)
Proceeds from disposal of property and equipment	100	178
Net cash used in investing activities	(12,420)	(2,910)
Cash flows from financing activities:
Proceeds from issuance of redeemable convertible preferred stock, net of offering costs	54,693	3,057
Proceeds from exercise of warrants for redeemable convertible preferred stock	183,007	0
Proceeds from issuance of related party convertible loan	0	50,000
Proceeds from issuance of warrants	0	11,943
Proceeds from early exercised stock options	782	0
Proceeds from issuance of common stock upon initial public offering, net of offering costs	1,030,965	0
Proceeds from issuance of common stock related to private placement	35,000	0
Proceeds from related party loan	0	5,000
Proceeds from loans	0	4,134
Return of guarantee deposit on related party loan	3,715	0
Principal payments on related party loan	(4,398)	0
Payment of third-party costs in connection with initial public offering	(2,812)	0
Principal payments on capital lease obligations	(586)	(528)
Principal payments on other liabilities	(353)	(38)
Net cash provided by financing activities	1,300,013	73,568
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	55	(324)
Net increase in cash, cash equivalents, and restricted cash	1,101,283	5,550
Cash, cash equivalents, and restricted cash - beginning of period	312,351	64,110
Cash, cash equivalents, and restricted cash - end of period	1,413,634	69,660
Reconciliation of cash, cash equivalents, and restricted cash to the condensed consolidated balance sheets:
Cash and cash equivalents	1,412,128	68,910
Restricted cash included in prepaid expenses and other current assets	1,506	750
Total cash and cash equivalents, and restricted cash	1,413,634	69,660
Supplemental disclosure of cash flow information:
Cash paid for interest	575	850
Supplemental schedule of non-cash investing and financing activities:
Acquisitions of property and equipment included in current liabilities	1,987	1,526
Accretion of redeemable convertible preferred stock	4,135	11,943
Vesting of early exercised stock options	63	0
Exercise of liability-classified warrants	369,352	0
Conversion of redeemable convertible preferred stock to common stock upon initial public offering	1,282,916	0
Cashless exercise of stock options for common stock	0	975
Issuance costs incurred in connection with initial public offering included in current liabilities	$ 779	$ 0