CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOW - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Oct. 01, 2023
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net loss	$ (1,929,939)	$ (1,278,158)
Adjustments to reconcile net loss to net cash used by operating activities:
Amortization of intangibles assets	103,750	103,750
Depreciation	14,865	15,018
Stock-based compensation expense	72,502	72,383
Cash payment for equity awards	(53,807)	(65,034)
Deferred income taxes	(104,990)	(34,133)
Goodwill and intangible impairment	1,420,936	718,466
Other	949	2,039
Changes in operating assets and liabilities:
Operating lease right-of-use assets and liabilities, net	1,545	5,521
Net cash used by operating activities	(483,666)	(466,902)
Cash flows from investing activities
Net cash used by investing activities	(4,905)	(8,992)
Cash flows from financing activities
Cash funding received from Illumina	1,244,300	378,000
Taxes paid related to net share settlement of equity awards	0	(220)
Net cash provided by financing activities	1,244,300	377,780
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	228	49
Net increase (decrease) in cash, cash equivalents, and restricted cash	755,957	(98,065)
Cash, cash equivalents and restricted cash — beginning of period	101,512	246,128
Cash, cash equivalents and restricted cash — end of period	857,469	148,063
Represented by:
Cash and cash equivalents.	853,551	143,838
Restricted cash	3,918	4,225
Total	857,469	148,063
Supplemental cash flow information:
Property and equipment included in accounts payable and accrued liabilities	(231)	(1,087)
Operating cash flows from operating leases, net	(14,773)	(13,896)
Nonrelated Party
Changes in operating assets and liabilities:
Accounts receivable	1,699	6,058
Supplies	(847)	(2,414)
Prepaid expenses and other assets	(1,254)	(1,938)
Accounts payable	(11,379)	(5,825)
Accrued and other liabilities	(935)	2,190
Cash flows from investing activities
Purchases of property and equipment	(4,905)	(6,348)
Related Party
Changes in operating assets and liabilities:
Accounts receivable	32	178
Supplies	1,329	(2,174)
Prepaid expenses and other assets	(24)	40
Accounts payable	(824)	(2,753)
Accrued and other liabilities	2,726	(116)
Cash flows from investing activities
Purchases of property and equipment	$ 0	$ (2,644)