Segment Information (Details) - Revenue [Member] |
12 Months Ended | |
|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
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| Segment Reporting Information [Line Items] | ||
| Total consolidated revenue | 100.00% | 100.00% |
| North America [Member] | ||
| Segment Reporting Information [Line Items] | ||
| Total consolidated revenue | 58.50% | 65.20% |
| U.K. [Member] | ||
| Segment Reporting Information [Line Items] | ||
| Total consolidated revenue | 22.00% | 19.90% |
| Other foreign markets [Member] | ||
| Segment Reporting Information [Line Items] | ||
| Total consolidated revenue | 19.50% | 14.90% |
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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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- 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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