Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 24, 2022
Cash flows from operating activities:
Net loss	$ (84,672)	$ (207,894)	$ (139,089)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	23,480	11,311	5,989
Foreign currency losses (gains)	(8)	(3)	25
(Gain) on investments	(10,084)	0	0
Loss on disposal of assets	337	2,914	4,098
Provision for excess and obsolete inventory	33,330	22,276	987
Deferred taxes, net	3,917	(4,620)	0
Stock-based compensation	112,208	154,227	26,858
Changes in operating assets and liabilities:
Accounts receivable	(132,305)	(65,817)	(508)
Inventories	103	(66,380)	(60,559)
Prepaid expenses and other current assets	(112,050)	(78,906)	(121,143)
Deferred expenses	(4,936)	(5,428)	(28,665)
Other assets	(8,263)	(18,635)	49
Accounts payable	65,270	41,415	41,528
Accrued expenses and other current liabilities	38,467	64,743	37,898
Deferred revenue	18,318	361,518	80,377
Other liabilities	(1,189)	20,073	3,908
Net cash provided by (used in) operating activities	(58,077)	230,794	(148,247)
Cash flows from investing activities:
Purchases of property and equipment	(42,237)	(15,688)	(17,950)
Capitalization of internal use software development costs	(2,137)	(5,638)	0
Proceeds from sale of assets	0	71	0
Proceeds from maturities of marketable securities	340,000	130,000	0
Purchases of marketable securities	(48,660)	(408,209)	0
Acquisitions of strategic investments	(90,485)	0	0
Net cash provided by (used in) investing activities	156,481	(299,464)	(17,950)
Cash flows from financing activities:
Payment for taxes related to net share settlement of stock-based compensation awards	(3,181)	(26,674)	0
Net proceeds from issuance of common stock under employee stock purchase plan	5,743	2,573	0
Proceeds from issuance of Class A Common Stock	257,985	0	0
Proceeds from exercise of warrants	158,704	0	277,776
Distributions to Symbotic Holdings LLC partners	(48,215)	0	0
Net proceeds from equity infusion from the Business Combination	0	0	384,672
Purchase of interest from non-controlling interest	0	0	(300,000)
Net cash provided by (used in) financing activities	371,036	(24,101)	362,448
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(4)	232	572
Net increase (decrease) in cash, cash equivalents, and restricted cash	469,436	(92,539)	196,823
Cash, cash equivalents, and restricted cash —beginning of period	260,918	353,457	156,634
Cash, cash equivalents, and restricted cash —end of period	730,354	260,918	353,457
Non-cash activities:
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	5,818	8,734	0
Transfer of equipment from deferred cost to property and equipment	38,454	0	0
Warrant associated with supplier agreement	12,308	0	0
Preferred Return, Class B-1
Non-cash activities:
Preferred Return	0	0	8,130
Preferred Return, Class B
Non-cash activities:
Preferred Return	$ 0	$ 0	$ 16,065