Property, Plant and Equipment (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Property, Plant and Equipment [Line Items]
Interest costs capitalized			$ 1,058	$ 139
Depreciation expense			1,264	679
Construction in progress
Property, Plant and Equipment [Line Items]
Interest costs capitalized	$ 1,058	$ 139	$ 2,285	$ 236