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Acquisitions (Details) - USD ($) $ in Millions |  |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
May 31, 2019 | Oct. 30, 2018 | May 31, 2019 | Jun. 27, 2020 | Jan. 02, 2021
Business Acquisition [Line Items] |  |  |  |  |
Fair value of contingent consideration |  |  |  | $ 9.9 | $ 8.9
Other |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Cash consideration paid at closing |  |  |  | 5.2 |
Fair value of contingent consideration |  |  |  | $ 5.5 |
3Z Telecom, Inc. |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Cash consideration paid at closing |  |  | $ 23.2 |  |
Earn-out liability | $ 7.0 |  | $ 7.0 |  |
Earn-out liability period | 2 years |  |  |  |
RPC Photonics, Inc. |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Cash consideration paid at closing |  | $ 33.4 |  |  |
Earn-out liability |  | $ 53.0 |  |  |
Earn-out liability period |  | 4 years |  |  |
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 |  |  |  | $ 6.2 |
Customer Relationships | Other |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Intangible assets acquired |  |  |  | $ 1.4 |

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- Definition For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 + Details
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