Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities
Net income (loss)	$ (115,909)	$ 121,190	$ (10,947)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities
Stock-based compensation expense	46,718	39,621	7,457
Depreciation and amortization expense	260	29	19
Accretion of premium and discounts on marketable securities	(5,465)
Changes in operating assets and liabilities
Unbilled accounts receivable			(5,815)
Prepaid expenses and other current assets	(6,251)	(483)	(7,296)
Other assets	(1,494)	(161)
Accounts payable	(1,983)	10,289	(488)
Accrued expenses and other liabilities	(37,623)	43,877	12,437
Deferred revenue		(301,367)	301,367
Operating lease liabilities	765
Net cash provided by (used in) operating activities	(120,982)	(87,005)	296,734
Cash flows from investing activities
Additions to property and equipment	(1,943)	(4)	(26)
Purchases of marketable securities	(545,352)
Sales and maturities of marketable securities	91,885
Net cash used in investing activities	(455,410)	(4)	(26)
Cash flows from financing activities
Net proceeds from issuance of convertible preferred stock			214,116
Proceeds from issuance of common stock for exercise of stock options	230	1,465	27
Proceeds from issuance of common stock under ESPP	140
Net proceeds from initial public offering of common stock			317,605
Net cash provided by financing activities	370	1,465	531,748
Net increase (decrease) in cash, cash equivalents and restricted cash	(576,022)	(85,544)	828,456
Cash, cash equivalents and restricted cash at the beginning of period	764,680	850,224	21,768
Cash, cash equivalents and restricted cash at the end of period	188,658	764,680	850,224
Cash, cash equivalents and restricted cash at the end of period
Cash and cash equivalents	188,460	764,375	850,117
Restricted cash	198	305	107
Cash, cash equivalents and restricted cash at the end of period	188,658	$ 764,680	850,224
Supplemental disclosure of non-cash financing activities
Conversion of preferred stock to common stock upon closing of initial public offering			$ 283,230
Right of use assets obtained in exchange for operating lease liabilities	$ 2,938