Segment Information - Additional Information (Detail) |
12 Months Ended |
|---|---|
|
Dec. 31, 2015
Segment
| |
| Segment Reporting Information [Line Items] | |
| Number of reporting segments | 1 |
| Maximum [Member] | |
| Segment Reporting Information [Line Items] | |
| Percentage of foreign revenue collected in US dollars | 95.00% |