Segments - Summary of Long-lived Assets, Net of Accumulated Depreciation, by Geographic Areas (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets, net of accumulated depreciation	$ 12,827	$ 13,487
North America
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets, net of accumulated depreciation	10,894	11,353
Europe
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets, net of accumulated depreciation	1,523	1,435
APAC
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets, net of accumulated depreciation	$ 410	$ 699