Summary of Net Revenue by Geographic Location (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Segment Reporting Information [Line Items] | |||
| Net revenue | $ 51,810 | $ 48,475 | $ 47,656 |
| UNITED STATES | |||
| Segment Reporting Information [Line Items] | |||
| Net revenue | 33,385 | 29,433 | 29,848 |
| International | |||
| Segment Reporting Information [Line Items] | |||
| Net revenue | $ 18,425 | $ 19,042 | $ 17,808 |