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Commitments and Contingencies - Litigation (Details) $ in Millions |  |  |  | 1 Months Ended | 12 Months Ended | 16 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 05, 2018 patent | Jan. 30, 2017 USD ($) | Jun. 10, 2015 product subsidiary patent customer | Sep. 30, 2015 patent | Dec. 31, 2016 USD ($) | Jun. 28, 2013 claim | Sep. 04, 2015 USD ($)
URC Lawsuit | Settled Litigation |  |  |  |  |  |  |
Contingencies [Line Items] |  |  |  |  |  |  |
Liability accrued |  |  |  |  | $ 6.6 |  |
Payment for settlement |  | $ 6.6 |  |  |  |  |
UEBV Lawsuit | Pending Litigation |  |  |  |  |  |  |
Contingencies [Line Items] |  |  |  |  |  |  |
Number of subsidiaries named in lawsuit | subsidiary |  |  | 1 |  |  |  |
Number of customers named in lawsuit | customer |  |  | 1 |  |  |  |
UEBV Lawsuit | Design Patents | Pending Litigation |  |  |  |  |  |  |
Contingencies [Line Items] |  |  |  |  |  |  |
Number of products named in lawsuit | product |  |  | 1 |  |  |  |
Number of patents allegedly infringed upon | patent |  |  | 2 |  |  |  |
UEBV Lawsuit | Utility Patent | Pending Litigation |  |  |  |  |  |  |
Contingencies [Line Items] |  |  |  |  |  |  |
Number of patents allegedly infringed upon | patent |  |  | 1 | 1 |  |  |
Roku Lawsuit | Utility Patent | Pending Litigation |  |  |  |  |  |  |
Contingencies [Line Items] |  |  |  |  |  |  |
Number of patents allegedly infringed upon | patent | 9 |  |  |  |  |  |
Operating Expense | URC Lawsuit | Settled Litigation |  |  |  |  |  |  |
Contingencies [Line Items] |  |  |  |  |  |  |
Lawsuits filed | claim |  |  |  |  |  | 2 |
Estimated litigation costs |  |  |  |  | $ 2.0 |  |
Surety Bond |  |  |  |  |  |  |
Contingencies [Line Items] |  |  |  |  |  |  |
Restricted cash |  |  |  |  |  |  | $ 4.6

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