Segment Reporting - Revenues (Details) $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2016
USD ($)
|
Sep. 30, 2016
USD ($)
|
Jun. 30, 2016
USD ($)
|
Mar. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
Sep. 30, 2015
USD ($)
|
Jun. 30, 2015
USD ($)
|
Mar. 31, 2015
USD ($)
|
Dec. 31, 2016
USD ($)
segment
|
Dec. 31, 2015
USD ($)
|
Dec. 31, 2014
USD ($)
|
|
| Revenues from External Customers and Long-Lived Assets [Line Items] | |||||||||||
| Number of Operating Segments | segment | 1 | ||||||||||
| Revenue | $ 46,309 | $ 51,381 | $ 48,363 | $ 54,528 | $ 61,030 | $ 63,250 | $ 56,150 | $ 69,470 | $ 200,581 | $ 249,900 | $ 223,146 |
| United States | |||||||||||
| Revenues from External Customers and Long-Lived Assets [Line Items] | |||||||||||
| Revenue | 149,031 | 171,759 | 132,447 | ||||||||
| Americas, excluding the United States | |||||||||||
| Revenues from External Customers and Long-Lived Assets [Line Items] | |||||||||||
| Revenue | 9,127 | 11,538 | 9,705 | ||||||||
| EMEA | |||||||||||
| Revenues from External Customers and Long-Lived Assets [Line Items] | |||||||||||
| Revenue | 24,303 | 36,134 | 43,507 | ||||||||
| APAC | |||||||||||
| Revenues from External Customers and Long-Lived Assets [Line Items] | |||||||||||
| Revenue | $ 18,120 | $ 30,469 | $ 37,487 | ||||||||