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GOODWILL AND INTANGIBLE ASSETS (Net intangible assets) (Details) - USD ($) $ in Thousands	6 Months Ended
	Apr. 03, 2021	Oct. 03, 2020
Schedule Of Intangible Assets [Line Items]
Net intangible assets	$ 46,046	$ 37,972
In Process Research and Development [Member]
Schedule Of Intangible Assets [Line Items]
Net intangible assets	9,000	0
Developed technology [Member]
Schedule Of Intangible Assets [Line Items]
Gross intangible assets	91,248	91,044
Accumulated amortization	(56,612)	(54,293)
Net intangible assets	34,636	36,751
Customer relationships [Member]
Schedule Of Intangible Assets [Line Items]
Gross intangible assets	36,355	36,307
Accumulated amortization	(36,355)	(35,587)
Net intangible assets	0	720
Trade name [Member]
Schedule Of Intangible Assets [Line Items]
Gross intangible assets	7,414	7,404
Accumulated amortization	(7,112)	(6,903)
Net intangible assets	302	501
Other intangible assets [Member]
Schedule Of Intangible Assets [Line Items]
Gross intangible assets	4,700	2,500
Accumulated amortization	(2,592)	(2,500)
Net intangible assets	$ 2,108	$ 0
Minimum | Developed technology [Member]
Schedule Of Intangible Assets [Line Items]
Average estimated useful lives (in years)	7 years
Minimum | Customer relationships [Member]
Schedule Of Intangible Assets [Line Items]
Average estimated useful lives (in years)	5 years
Minimum | Trade name [Member]
Schedule Of Intangible Assets [Line Items]
Average estimated useful lives (in years)	7 years
Minimum | Other intangible assets [Member]
Schedule Of Intangible Assets [Line Items]
Average estimated useful lives (in years)	1 year 10 months 24 days
Maximum | Developed technology [Member]
Schedule Of Intangible Assets [Line Items]
Average estimated useful lives (in years)	15 years
Maximum | Customer relationships [Member]
Schedule Of Intangible Assets [Line Items]
Average estimated useful lives (in years)	6 years
Maximum | Trade name [Member]
Schedule Of Intangible Assets [Line Items]
Average estimated useful lives (in years)	8 years
Maximum | Other intangible assets [Member]
Schedule Of Intangible Assets [Line Items]
Average estimated useful lives (in years)	6 years

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
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-Publisher FASB
-Name Accounting Standards Codification
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