Property and Equipment, Net - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 16,673	$ 16,435
Less: Accumulated depreciation	(13,972)	(12,810)
Total property and equipment, net	2,701	3,625
Servers, computer equipment and software
Property, Plant and Equipment [Line Items]
Total property and equipment	15,014	14,901
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	889	863
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 770	$ 671