Manufactured Methane (Methane Facilities) (Details) - Methane Project [Member] - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Manufactured Methane facilities, at cost	$ 1,669	$ 1,633
Accumulated depreciation	(75)	(60)
Manufactured Methane facilities, net	$ 1,594	$ 1,573