Business Segments - Summary of Revenue by Geographic Region (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Revenues From External Customers And Long Lived Assets [Line Items] | ||||
| Total revenue | $ 28,059 | $ 28,505 | $ 79,463 | $ 91,483 |
| Domestic | ||||
| Revenues From External Customers And Long Lived Assets [Line Items] | ||||
| Total revenue | 22,708 | 24,621 | 64,214 | 79,054 |
| International | ||||
| Revenues From External Customers And Long Lived Assets [Line Items] | ||||
| Total revenue | $ 5,351 | $ 3,884 | $ 15,249 | $ 12,429 |