Geographic Information (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | |
|---|---|---|---|
Jun. 30, 2018 |
Jun. 30, 2018 |
Jun. 30, 2017 |
|
| Revenues from External Customers and Long-Lived Assets [Line Items] | |||
| Revenue | $ 8,595 | $ 16,079 | $ 18,056 |
| North America | |||
| Revenues from External Customers and Long-Lived Assets [Line Items] | |||
| Revenue | 10,165 | 12,038 | |
| International | |||
| Revenues from External Customers and Long-Lived Assets [Line Items] | |||
| Revenue | 5,914 | 6,018 | |
| United Kingdom | |||
| Revenues from External Customers and Long-Lived Assets [Line Items] | |||
| Revenue | 3,047 | 3,551 | |
| Middle East | |||
| Revenues from External Customers and Long-Lived Assets [Line Items] | |||
| Revenue | $ 2,867 | $ 2,467 | |