Organization, Nature of Business, Basis of Presentation, Liquidity, and Going Concern Considerations (Details Textual) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011	Dec. 31, 2010	Jun. 30, 2007	Sep. 30, 2012 Senior Debt Facility [Member]	Sep. 28, 2012 Senior Debt Facility [Member]	Sep. 30, 2012 Common Class B [Member]	Dec. 31, 2011 Common Class B [Member]	Sep. 30, 2012 Subsidiaries [Member]	Dec. 31, 2011 Subsidiaries [Member]	Sep. 30, 2012 Cargill [Member]	Dec. 31, 2011 Cargill [Member]
Reverse Stock Split Outstanding Common Stock Ratio			one-for-twenty
Reverse Stock Split Authorized Common Stock Ratio			one-for-fourteen
Common stock, shares authorized	10,000,000		10,000,000		10,000,000					3,750,000	3,750,000
Stockholders' Equity, Reverse Stock Split			On June 15, 2012, the Company effected a reverse stock split with respect to all outstanding shares of common stock and Class B common stock at a ratio of one-for-twenty. The Company also split the number of authorized shares of common stock at a ratio of one-for-fourteen, thereby reducing the aggregate number of authorized common stock shares to 10,000,000, and also split the number of authorized shares of Class B common stock at a ratio of one-for-twenty, thereby reducing the aggregate number of authorized Class B common stock shares to 3,750,000. All share and per share information in these financial statements has been retroactively restated to reflect the effect of this reverse stock split.
Production Capacity Of Nameplate				220,000,000
Percentage Of Owned Of Subsidiaries Membership Units			87.30%
Remaining Percentage Of Owned By Investment Funds Affiliates			12.70%
Common stock, shares outstanding	5,483,773		5,483,773		5,270,848		897,903			795,479	931,154
Total assets	$ 263,169,000		$ 263,169,000		$ 299,586,000							$ 272,500,000	$ 309,200,000
Net loss	(11,328,000)	2,549,000	(34,835,000)	(14,817,000)	(10,361,000)
Cash and cash equivalents	10,842,000	9,664,000	10,842,000	9,664,000	15,139,000	7,428,000
Accounts payable	13,085,000		13,085,000		9,380,000									11,100,000	5,600,000
Maximum Amount Of Contractual Limit	10,000,000
Long-term Debt, Gross								170,500,000
Total	$ 173,239,000		$ 173,239,000		$ 179,647,000				$ 3,600,000