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Segment Information - Additional Information (Detail) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 28, 2020 plant | Dec. 28, 2020 USD ($) Segment Country | Dec. 30, 2019 USD ($) | Dec. 31, 2018 USD ($)
Segment Reporting Information [Line Items] |  |  |  |
Number of reportable segments |  | 2 |  |
Number of countries the parent company markets and sells its products | Country |  | 53 |  |
Percentage of total net sales, if exceed, the company does not conduct business |  | 10.00% |  |
Corporate |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Business combination, acquisition and divestitures related costs | $ |  | $ 273 | $ 6,902 | $ 13,279
Printed Circuit Board | Domestic PCB, RF Sub-System, and RF Component Fabrication Plants |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Number of operating segments |  | 15 |  |
Printed Circuit Board | PCB Fabrication Plants | CHINA |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Number of operating segments |  | 5 |  |
Printed Circuit Board | PCB Fabrication Plants | Canada |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Number of operating segments |  | 1 |  |
RF&S Components | Domestic RF Component Plants |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Number of reportable segments |  | 1 |  |
RF&S Components | RF Component Plant | CHINA |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Number of reportable segments |  | 1 |  |
E-M Solutions | Custom Electronic Assembly Plants | CHINA |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Number of operating segments |  | 3 |  |
Number of plants closed | plant | 2 |  |  |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=116868678&loc=d3e1043-128460 + Details
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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8672-108599 + Details
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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8672-108599 + Details
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