SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Cash, Cash Equivalents and Marketable Securities) (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 27, 2024	Oct. 03, 2025	Sep. 27, 2024	Sep. 29, 2023
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash and cash equivalents	$ 145,498	$ 176,399	$ 145,498
Proceeds from maturities of short-term investments		16,316	27,025	$ 0
Investments purchased		0	2,218	40,696
Unrealized gain (loss) on available-for-sale securities, net of tax		0	0	0
Contractual accounts receivable	44,192	51,686	44,192
Allowance for credit losses	3,543	1,232	3,543
Depreciation		20,044	19,269	16,005
Goodwill impairment	11,173	0	11,173	0
Goodwill	$ 0	10,456	$ 0	$ 11,172
Non-US
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash and cash equivalents		$ 69,015