Methane Project (Details) (Methane Project [Member], USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Methane Project [Member]
Methane Project [Line Items]
Date methane facilities were placed into service	Apr. 01, 2009
Landfill closure date	Dec. 31, 2041
Methane facilities estimated useful life	33 years
Depreciation expense	$ 98,000	$ 79,000