Property, Plant and Equipment (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Depreciation	$ 1,711	$ 946	$ 560
Interest costs capitalized	3,600	400
Construction in progress
Property, Plant and Equipment [Line Items]
Payroll	$ 800	$ 400