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Commitments and Contingencies (Details) $ in Millions |  |  |  | 3 Months Ended |
--- | --- | --- | --- | --- | ---
May. 14, 2015 USD ($) | Apr. 24, 2015 USD ($) | Mar. 05, 2015 item | Mar. 31, 2015 USD ($) | Mar. 31, 2016 item
Skyhook | Patent infringement lawsuit |  |  |  |  |
General Litigation |  |  |  |  |
Number of claims | item |  |  | 8 |  |
Number of days before action is reopened |  |  | 45 days |  |
Litigation settlement amount |  |  |  | $ 90.0 |
Proceeds from Legal Settlements |  | $ 90.0 |  |  |
Legal Fees |  |  |  | $ 29.5 |
TruePosition | Polaris patent infringement lawsuit |  |  |  |  |
General Litigation |  |  |  |  |
Loss Contingency, Damages Sought, Value | $ 3.0 |  |  |  |
TruePosition | Indemnification claim |  |  |  |  |
General Litigation |  |  |  |  |
Number of claims | item |  |  |  |  | 4

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