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GOODWILL AND INTANGIBLE ASSETS (Net intangible assets) (Details) - USD ($) $ in Thousands | Dec. 30, 2023 | Sep. 30, 2023
--- | --- | ---
Schedule Of Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 133,631 | $ 130,929
Accumulated Amortization | (104,715) | (101,572)
Net Amount | 28,916 | 29,357
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 | 82,874 | 80,959
Accumulated Amortization | (57,961) | (55,877)
Net Amount | $ 24,913 | 25,082
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 | $ 37,439 | 36,764
Accumulated Amortization | (35,530) | (34,789)
Net Amount | $ 1,909 | 1,975
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 | $ 7,241 | 7,130
Accumulated Amortization | (7,241) | (7,130)
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 | (3,983) | (3,776)
Net Amount | $ 1,635 | $ 1,841
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 |

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(16)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
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