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Investments in Equity Securities (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 28, 2018 | Sep. 28, 2018 | Oct. 22, 2014 | Sep. 02, 2014
Vislink plc [Member] |  |  |  |
Schedule of Cost-method Investments [Line Items] (Deprecated 2018-01-31) |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  |  |  | 3.30%
Cost Method Investments Original Cost |  |  |  | $ 3.3
Pebble Beach Systems [Member] |  |  |  |
Schedule of Cost-method Investments [Line Items] (Deprecated 2018-01-31) |  |  |  |
Proceeds from Sale of Available-for-sale Securities, Equity | $ 0.1 |  |  |
Cost-method Investments, Realized Gain (Loss) | $ (0.1) | $ 0.1 |  |
Variable Interest Entity, Not Primary Beneficiary [Member] | EDC [Member] |  |  |  |
Schedule of Cost-method Investments [Line Items] (Deprecated 2018-01-31) |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  |  | 18.40% |
Cost Method Investments Original Cost |  |  | $ 3.5 |
Cost-method Investments, Other than Temporary Impairment |  | $ 0.0 |  |

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- Definition This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the cost method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment. + References No definition available. + Details
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- Definition The cash inflow associated with the sale of equity securities classified as available-for-sale securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=109979856&loc=d3e26853-111562 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 + Details
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