Summary of Significant Accounting Policies (Details Textual) (USD $)	12 Months Ended							12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Wood River Plant [Member]	Dec. 31, 2011 Wood River Plant [Member]	Dec. 31, 2012 Fairmont Plant [Member]	Dec. 31, 2011 Fairmont Plant [Member]	Dec. 31, 2012 Cargill [Member]	Dec. 31, 2011 Cargill [Member]	Dec. 31, 2012 Sales Revenue, Goods, Net [Member]	Dec. 31, 2011 Sales Revenue, Goods, Net [Member]	Dec. 31, 2012 Accounts Receivable [Member]	Dec. 31, 2011 Accounts Receivable [Member]
Cash and cash equivalents	$ 9,323,000	$ 15,139,000	$ 7,428,000
Concentration Risk Percentage During Period										75.00%	88.00%
Allowance for Doubtful Accounts Receivable	0	0
Accounts receivable	9,256,000	13,591,000						7,500,000	12,000,000
Concentration Risk, Percentage												81.00%	88.00%
Cost of Purchased Oil and Gas								384,600,000	528,100,000
Accounts payable	11,638,000	9,380,000						9,000,000	5,600,000
Asset Retirement Obligation				149,000	144,000	188,000	181,000
Property, Plant and Equipment, Estimated Useful Lives	20 years
Longterm Debt Anticipated Interest Rate	12.00%
Long-term Debt, Fair Value	$ 155,300,000