Property and Equipment, Net - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment
Total, at cost	$ 36,305	$ 30,085
Less: Accumulated Depreciation and Amortization, Property, Plant, and Equipment	(14,713)	(12,948)
Property, Plant and Equipment, Net	21,592	17,137
Building
Property, Plant and Equipment
Total, at cost	8,975	6,651
Construction in Progress [Member]
Property, Plant and Equipment
Total, at cost	854	0
Land
Property, Plant and Equipment
Total, at cost	2,114	2,114
Office Equipment
Property, Plant and Equipment
Total, at cost	3,043	2,800
Computer Equipment
Property, Plant and Equipment
Total, at cost	20,226	17,932
Leasehold Improvements
Property, Plant and Equipment
Total, at cost	20	20
Vehicles [Member]
Property, Plant and Equipment
Total, at cost	$ 1,073	$ 568