Property and Equipment, Net - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment
Total, at cost	$ 46,197	$ 30,085
Less: Accumulated Depreciation and Amortization, Property, Plant, and Equipment	(17,323)	(12,948)
Property, Plant and Equipment, Net	28,874	17,137
Building
Property, Plant and Equipment
Total, at cost	10,399	6,651
Land
Property, Plant and Equipment
Total, at cost	2,114	2,114
Office Equipment
Property, Plant and Equipment
Total, at cost	3,218	2,800
Computer Equipment
Property, Plant and Equipment
Total, at cost	28,948	17,932
Leasehold Improvements
Property, Plant and Equipment
Total, at cost	20	20
Vehicles
Property, Plant and Equipment
Total, at cost	$ 1,498	$ 568