Methane Project (Details) (USD $)	1 Months Ended	9 Months Ended
	Jun. 30, 2012	Sep. 30, 2012	Sep. 30, 2011
Methane Project [Line Items]
Cash payment in lieu of tax credits		$ 1,000,000
Methane Project [Member]
Methane Project [Line Items]
Date methane facilities were placed into service		Apr. 01, 2009
Landfill closure date		Dec. 01, 2041
Methane facilities estimated useful life		33 years
Depreciation expense		80,000	70,000
Cash payment in lieu of tax credits	$ 1,000,000
Period of ineligibility after tax credit incentive award date		5 years