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Commitments and Contingencies - Gain and Loss Contingencies (Details) $ in Millions |  |  |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Feb. 10, 2017 USD ($) | Jan. 30, 2017 USD ($) | Jun. 10, 2015 product subsidiary patent customer | Sep. 30, 2015 patent | Dec. 31, 2017 claim | Dec. 31, 2016 USD ($) | Sep. 04, 2015 USD ($)
Patent Lawsuit Against Universal Remote Control | Settled Litigation |  |  |  |  |  |  |
Contingencies [Line Items] |  |  |  |  |  |  |
Liability accrued |  |  |  |  |  | $ 6.6 |
Payment for settlement |  | $ 6.6 |  |  |  |  |
Patent Lawsuit Against UEBV and Telenet | Pending Litigation |  |  |  |  |  |  |
Contingencies [Line Items] |  |  |  |  |  |  |
Number of subsidiaries named in lawsuit | subsidiary |  |  | 1 |  |  |  |
Number of customers named in lawsuit | customer |  |  | 1 |  |  |  |
Patent Lawsuit Against UEBV and Telenet | Design Patents | Pending Litigation |  |  |  |  |  |  |
Contingencies [Line Items] |  |  |  |  |  |  |
Number of products named in lawsuit | product |  |  | 1 |  |  |  |
Number of patents allegedly infringed upon | patent |  |  | 2 |  |  |  |
Patent Lawsuit Against UEBV and Telenet | Utility Patent | Pending Litigation |  |  |  |  |  |  |
Contingencies [Line Items] |  |  |  |  |  |  |
Number of patents allegedly infringed upon | patent |  |  | 1 | 1 |  |  |
Operating Expense | Patent Lawsuit Against Universal Remote Control | Settled Litigation |  |  |  |  |  |  |
Contingencies [Line Items] |  |  |  |  |  |  |
Lawsuits filed | claim |  |  |  |  | 2 |  |
Estimated litigation costs |  |  |  |  |  | $ 2.0 |
Surety bond returned | $ 4.6 |  |  |  |  |  |
Surety Bond |  |  |  |  |  |  |
Contingencies [Line Items] |  |  |  |  |  |  |
Restricted cash |  |  |  |  |  |  | $ 4.6

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