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Summary of Significant Accounting Policies Concentration of Credit Risk (Details) | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Concentration Risk |  |  |
Disclosure On Geographic Areas Revenue From External Customers Attributed to France | 99.00% | 94.00% |
Disclosure on Geographic Areas, Revenue from External Customers Attributed to Entity's Country of Domicile, Percent | 1.00% | 6.00% | 100.00%

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- Definition Revenues from external customers attributed to the entity's country of domicile as a percentage of total revenue. + References No definition available. + Details
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- Definition Revenues from external customers attributed to France as a percentage of total revenue. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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