Land Use Rights - Schedule of Amortization Expense Related to Land Use Rights (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
2018	$ 201
2019	194
2020	194
2021	194
2022	194
Thereafter	1,736
Total	$ 2,713	$ 45,275