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Investments in Other Equity Securities (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
May 31, 2016 | Sep. 30, 2016 | Apr. 01, 2016 | Apr. 03, 2015 | Sep. 30, 2016 | Dec. 31, 2016 | Dec. 31, 2015 | Oct. 15, 2015 | Oct. 22, 2014 | Sep. 26, 2014 | Sep. 02, 2014
Schedule of Cost-method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cost Method Investments, Carrying Value |  |  |  |  |  |  | $ 4,400 | $ 5,400 |  |  |  |
Vislink plc [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cost Method Investments, Original Cost |  |  |  |  |  |  |  |  |  |  |  | $ 3,300
Cost-method Investments, Other than Temporary Impairment |  |  | $ 1,200 | $ 1,500 |  |  |  | 0 |  |  |  |
Stock Price Decrease, Percentage |  |  |  |  |  | 70.00% |  |  |  |  |  |
Stock Price Increase, Percentage |  |  |  |  |  |  | 67.00% |  |  |  |  |
Cost Method Investments, Carrying Value |  |  |  |  |  |  | $ 800 | 1,800 |  |  |  |
Unrealized (Loss) on Cost Method Investments, |  |  |  |  |  |  | 300 | (1,500) |  |  |  |
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax |  |  |  |  |  |  |  | (1,500) |  |  |  |
Period Stock Price Below Cost |  | 7 months |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  |  |  |  |  |  |  |  |  |  |  | 3.30%
VJU Gmbh [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cost Method Investments, Original Cost |  |  |  |  |  |  |  |  |  |  | $ 2,500 |
Cost-method Investments, Other than Temporary Impairment |  |  |  |  | $ 2,500 |  | 2,500 |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  |  |  |  |  |  |  |  | 9.90% |  | 19.80% |
EDC [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cost Method Investments, Original Cost |  |  |  |  |  |  |  |  |  | $ 3,500 |  |
Noncontrolling Interest, Ownership Percentage by Parent |  |  |  |  |  |  |  |  |  | 18.40% |  |
Variable Interest Entity, Not Primary Beneficiary [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cost Method Investments, Carrying Value |  |  |  |  |  |  | 3,593 |  |  |  |  |
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount | [1] |  |  |  |  |  | 3,593 |  |  |  |  |
Variable Interest Entity, Not Primary Beneficiary [Member] | VJU Gmbh [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount | [1],[2] |  |  |  |  |  | 0 |  |  |  |  |
Variable Interest Entity, Not Primary Beneficiary [Member] | EDC [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cost Method Investments, Carrying Value | [2] |  |  |  |  |  | 3,593 |  |  |  |  |
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount | [1] |  |  |  |  |  | 3,593 |  |  |  |  |
Other Assets [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] | EDC [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cost Method Investments, Carrying Value |  |  |  |  |  |  | 3,600 | 3,600 |  |  |  |
Cost-method Investments [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] | VJU Gmbh [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cost Method Investments, Carrying Value | [2] |  |  |  |  |  | 0 |  |  |  |  |
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 |  |  |  |  |
Prepaid Expenses and Other Current Assets [Member] | Vislink plc [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Prepayment for Future Software License Purchases |  |  |  |  |  |  |  | $ 0 |  |  |  |
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 |  |  |  |  |
[1] | The Company did not provide financial support to any of its unconsolidated VIEs during the year ended December 31, 2016. As of December 31, 2016, there were no explicit arrangements or implicit variable interests that could require the Company to provide financial support to any of its unconsolidated VIEs.
[2] | The Company’s maximum exposure to loss with respect to EDC as of December 31, 2016 was limited to the investment cost of $3.6 million, including $0.1 million of transaction costs.

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