Description Of Business And Significant Accounting Policies (Narrative) (Details) (USD $)	12 Months Ended				12 Months Ended											1 Months Ended	12 Months Ended
	Dec. 31, 2012 mi	Dec. 31, 2011	Dec. 31, 2010	Mar. 01, 2013	Dec. 31, 2012 Customer A [Member]	Dec. 31, 2011 Customer A [Member]	Dec. 31, 2010 Customer A [Member]	Dec. 31, 2012 Customer B [Member]	Dec. 31, 2011 Customer B [Member]	Dec. 31, 2010 Customer B [Member]	Dec. 31, 2012 Customer C [Member]	Dec. 31, 2011 Customer C [Member]	Dec. 31, 2010 Customer C [Member]	Dec. 31, 2012 Pipeline [Member]	Dec. 31, 2010 Pipeline [Member]	Jun. 30, 2012 Methane Facilities [Member]	Dec. 31, 2012 Methane Facilities [Member]	Dec. 31, 2011 Methane Facilities [Member]	Dec. 31, 2010 Methane Facilities [Member]	Dec. 31, 2012 Other Property And Equipment [Member]	Dec. 31, 2011 Other Property And Equipment [Member]	Dec. 31, 2010 Other Property And Equipment [Member]	Dec. 31, 2012 Minimum [Member]	Dec. 31, 2012 Minimum [Member] Other Property And Equipment [Member]	Dec. 31, 2012 Maximum [Member]	Dec. 31, 2012 Maximum [Member] Other Property And Equipment [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Length of pipeline, miles	65
Certificate of Deposit to cover future asset retirement obligations	$ 120,500
Collateral for a bond to appeal a civil penalty	386,000
Unevaluated properties	457,000	268,000
Current cost discount	10.00%
Estimated useful life														30 years			32 years 9 months							2 years		7 years
Impairment														5,200,000	5,000,000
Impairment net of tax														3,400,000	3,300,000
Book value of property	1,813,000	1,822,000
Depreciation expense																		100,000	100,000	200,000	200,000	200,000
Cash payment in lieu of tax credits																1,000,000
Period of ineligibility after tax credit incentive award date	5 years
Compensation expense	52,000	165,000	111,000
Federal net operating loss carryforwards	21,800,000
Federal net operating loss carryforwards expiration between, years	2019 and 2031																						2019		2031
Deferred tax asset	9,434,000	10,241,000
Customer's percentage of revenue					84.00%	83.50%	80.00%	14.30%	13.90%	16.60%	2.20%	1.90%	2.30%
Sale price of Swan Creek and Pipeline assets				$ 1,500,000