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Summary of Significant Accounting Policies - Additional Information (Details 2) | 12 Months Ended | 15 Months Ended | 21 Months Ended
--- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2014 segment | Oct. 01, 2013 segment
Description of Business |  |  |
Number or reportable segments |  | 1 us-gaap_NumberOfReportableSegments | 2 us-gaap_NumberOfReportableSegments
Fiscal Calendar |  |  |
Fiscal quarter, number of weeks | 91 days |  |
Cash and Cash Equivalents |  |  |
Maturity period of highly liquid investments | 3 months |  |

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- Details
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- Definition Represents the length of a fiscal quarter. The fiscal calendar may be greater than or less than the term depending on the days of the week the beginning and ending dates of the fiscal year fall. + References No definition available. + Details
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- Definition Maximum maturity period of highly liquid investments. + References No definition available. + Details
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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
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