Stock Price Decrease, Percentage

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- Definition

Stock Price Increase, Percentage

+ References

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- Definition

Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments.

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Original amount of cost-method investments at the acquisition date.

+ References

No definition available.

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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.

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For investments in debt and equity securities accounted for at cost, the excess of the carrying amount over net sale proceeds of investments disposed of during the period.

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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No definition available.

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- Definition

Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

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- Definition

Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer.

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- Definition

The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

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Investments in Other Equity Securities Investments in Other Equity Securities (Details) - USD ($)	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 29, 2017	Dec. 31, 2016	Sep. 30, 2016	Apr. 01, 2016	Sep. 29, 2017	Sep. 30, 2016	Dec. 31, 2016	Oct. 22, 2014	Sep. 02, 2014
Schedule of Cost-method Investments [Line Items]
Cost Method Investments Carrying Value	$ 3,800,000	$ 4,400,000			$ 3,800,000		$ 4,400,000
Research and development	21,289,000		$ 24,202,000		73,226,000	$ 74,272,000
Prepaid expenses and other current assets	22,682,000	26,319,000			22,682,000		26,319,000
Cost-method Investments, Other than Temporary Impairment	0		1,259,000		0	$ 2,735,000
Vislink plc [Member]
Schedule of Cost-method Investments [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent									3.30%
Cost Method Investments Original Cost									$ 3,300,000
Cost Method Investments Carrying Value	200,000	$ 800,000			200,000		800,000
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax					(300,000)		$ 300,000
Cost-method Investments, Other than Temporary Impairment			$ 1,200,000	$ 1,500,000
Stock Price Increase, Percentage		67.00%
Pebble Beach Systems [Member]
Schedule of Cost-method Investments [Line Items]
Cost Method Investments Carrying Value	200,000				200,000
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax					(300,000)
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	$ 500,000				500,000
Stock Price Decrease, Percentage	82.00%
Variable Interest Entity, Not Primary Beneficiary [Member] \| EDC [Member]
Schedule of Cost-method Investments [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent								18.40%
Cost Method Investments Original Cost								$ 3,500,000
Cost-method Investments, Other than Temporary Impairment					0
Other Comprehensive Income (Loss) [Member] \| Pebble Beach Systems [Member]
Schedule of Cost-method Investments [Line Items]
Cost-method Investments, Realized Losses, Excluding Other than Temporary Impairments					600,000
Cost-method Investments [Member] \| Variable Interest Entity, Not Primary Beneficiary [Member] \| EDC [Member]
Schedule of Cost-method Investments [Line Items]
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	$ 3,600,000				3,600,000
Other Expense [Member] \| Variable Interest Entity, Not Primary Beneficiary [Member] \| EDC [Member]
Schedule of Cost-method Investments [Line Items]
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	$ 100,000				$ 100,000