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Acquisitions - Narrative (Details) - USD ($) |  |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
May 31, 2019 | Oct. 30, 2018 | Oct. 02, 2021 | Oct. 03, 2020 | Jun. 27, 2020 | Jul. 03, 2021
Business Acquisition [Line Items] |  |  |  |  |  |
Fair value of contingent consideration |  |  | $ 4,300,000 |  |  | $ 4,000,000.0
Payments for earnout liabilities |  |  | 0 | $ 0 |  |
3Z Telecom, Inc. |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash consideration paid at closing | $ 23,200,000 |  |  |  |  |
Earn-out liability | $ 7,000,000 |  |  |  |  |
Earn-out liability period | 2 years |  |  |  |  |
RPC Photonics, Inc. |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash consideration paid at closing |  | $ 33,400,000 |  |  |  |
Earn-out liability |  | $ 53,000,000 |  |  |  |
Earn-out liability period |  | 4 years |  |  |  |
Other |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Total purchase consideration |  |  | 1,600,000 |  |  |
Cash consideration paid at closing |  |  | 1,200,000 |  | $ 5,200,000 |
Consideration, liabilities incurred |  |  | $ 400,000 |  |  |
Estimated useful life |  |  | 5 years |  |  |
Fair value of contingent consideration |  |  |  |  |  | $ 5,500,000
Acquired Developed Technology And Customer Relationships | Other |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Estimated useful life |  |  |  |  | 6 years |
Developed Technology Rights | Other |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Intangible assets acquired |  |  |  |  | $ 6,200,000 |
Customer Relationships | Other |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Intangible assets acquired |  |  |  |  | $ 1,400,000 |

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