Other Property And Equipment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Gross Cost	$ 445,000	$ 513,000
Accumulated depreciation	245,000	313,000
Manufactured Methane facilities, net	200,000	200,000
Depreciation expense	77,000	101,000	$ 170,000
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Gross Cost	20,000	20,000
Accumulated depreciation	20,000	17,000
Manufactured Methane facilities, net		3,000
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Gross Cost	362,000	430,000
Accumulated depreciation	162,000	233,000
Manufactured Methane facilities, net	$ 200,000	$ 197,000
Other [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	5 years	5 years
Gross Cost	$ 63,000	$ 63,000
Accumulated depreciation	$ 63,000	$ 63,000
Minimum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	5 years	5 years
Minimum [Member] | Vehicles [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	2 years	2 years
Maximum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	7 years	7 years
Maximum [Member] | Vehicles [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	5 years	5 years