Concentrations (Details) - Sales revenue segment - Customer concentration risk |
6 Months Ended | |
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Jun. 30, 2016 |
Jun. 30, 2015 |
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| Concentration Risk [Line Items] | ||
| Southwest Airlines, concentration risk, percent | 24.00% | 25.00% |
| Connectivity | ||
| Concentration Risk [Line Items] | ||
| Southwest Airlines, concentration risk, percent | 83.00% | 89.00% |
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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. No definition available.
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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