Segment, Geographic and Concentration Information - Additional Information (Detail) |
12 Months Ended |
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Dec. 31, 2016
Segment
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| Segment Reporting Information [Line Items] | |
| Number of reportable segments | 1 |
| X | ||||||||||
- 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. No definition available.
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| X | ||||||||||
- 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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