Investments in Equity Securities (Details) (USD $)	Sep. 26, 2014	Dec. 31, 2013	Sep. 26, 2014 VJU GmbH [Member]	Sep. 02, 2014 Vislink plc [Member]	Sep. 26, 2014 Cost-method Investments [Member] Variable Interest Entity, Not Primary Beneficiary [Member] VJU GmbH [Member]	Sep. 26, 2014 Research and development expense [Member] Variable Interest Entity, Not Primary Beneficiary [Member] VJU GmbH [Member]
Schedule of Cost-method Investments [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent			19.80%	3.30%
Cost Method Investments Original Cost			$ 2,500,000	$ 3,300,000
Prepaid expenses and other current assets	26,852,000	21,521,000		3,300,000
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount					2,500,000	100,000
Cost Method Investments Carrying Value				$ 3,100,000