GOODWILL AND INTANGIBLE ASSETS (Net intangible assets) (Details) - USD ($) $ in Thousands	Mar. 29, 2025	Sep. 28, 2024
Schedule Of Intangible Assets [Line Items]
Gross Carrying Amount	$ 69,568	$ 134,374
Accumulated Amortization	(63,353)	(109,135)
Net Amount	6,215	25,239
In-process research and development
Schedule Of Intangible Assets [Line Items]
Gross Carrying Amount	459	459
Accumulated Amortization	0	0
Net Amount	459	459
Developed technology
Schedule Of Intangible Assets [Line Items]
Gross Carrying Amount	37,461	83,401
Accumulated Amortization	(34,310)	(61,575)
Net Amount	$ 3,151	21,826
Developed technology \| Minimum
Schedule Of Intangible Assets [Line Items]
Average estimated useful lives (in years)	6 years
Developed technology \| Maximum
Schedule Of Intangible Assets [Line Items]
Average estimated useful lives (in years)	15 years
Customer relationships
Schedule Of Intangible Assets [Line Items]
Gross Carrying Amount	$ 21,430	37,625
Accumulated Amortization	(19,855)	(35,916)
Net Amount	$ 1,575	1,709
Customer relationships \| Minimum
Schedule Of Intangible Assets [Line Items]
Average estimated useful lives (in years)	5 years
Customer relationships \| Maximum
Schedule Of Intangible Assets [Line Items]
Average estimated useful lives (in years)	8 years
Trade and brand name
Schedule Of Intangible Assets [Line Items]
Gross Carrying Amount	$ 4,600	7,272
Accumulated Amortization	(4,600)	(7,272)
Net Amount	$ 0	0
Trade and brand name \| Minimum
Schedule Of Intangible Assets [Line Items]
Average estimated useful lives (in years)	7 years
Trade and brand name \| Maximum
Schedule Of Intangible Assets [Line Items]
Average estimated useful lives (in years)	8 years
Other intangible assets
Schedule Of Intangible Assets [Line Items]
Gross Carrying Amount	$ 5,618	5,617
Accumulated Amortization	(4,588)	(4,372)
Net Amount	$ 1,030	$ 1,245
Other intangible assets \| Minimum
Schedule Of Intangible Assets [Line Items]
Average estimated useful lives (in years)	1 year
Other intangible assets \| Maximum
Schedule Of Intangible Assets [Line Items]
Average estimated useful lives (in years)	8 years