Property and Equipment, Net - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment
Total, at cost	$ 33,371	$ 30,085
Vehicles, Gross	954	568
Construction in Progress, Gross	404	0
Less: Accumulated Depreciation and Amortization, Property, Plant, and Equipment	(13,807)	(12,948)
Property, Plant and Equipment, Net	19,564	17,137
Building
Property, Plant and Equipment
Total, at cost	8,668	6,651
Land
Property, Plant and Equipment
Total, at cost	2,114	2,114
Office Equipment
Property, Plant and Equipment
Total, at cost	2,772	2,800
Computer Equipment
Property, Plant and Equipment
Total, at cost	18,439	17,932
Leasehold Improvements
Property, Plant and Equipment
Total, at cost	$ 20	$ 20