Stockholders' Equity (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2007
Proceeds from sale of stock	$ 0	$ 46,000,000
Extinguishment of Debt, Amount			2,000,000
Forgiveness Of Debt			2,800,000
Reverse Stock Split Outstanding Common Stock Ratio	one-for-twenty
Reverse Stock Split Authorized Common Stock Ratio	one-for-fourteen
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.
Common stock, shares authorized	10,000,000	10,000,000
Treasury shares	40,481	40,481
Treasury Stock Acquired, Average Cost Per Share	$ 106.62
Amount Available Under Stock Repurchase Plan	3,184,000
Stock Repurchase Program, Authorized Amount				7,500,000
Bridge Loan [Member]
Repayments of Debt		20,300,000
Subordinated Debt [Member]
Repayments of Debt		21,500,000
Debt Owed To Cargill [Member]
Repayments of Debt		$ 2,800,000
Common Stock [Member]
Stock Issued During Period Shares New Issue One		3,188,681
Stock Issued During Period Per Share Issues One (in dollars per share)		$ 11.2
Issuance of common stock in exchange for debt (in shares)		329,890
Common Class B [Member]
Stock Issued During Period Value New Issue Two		918,463
Stock Issued During Period Per Share Issues Two (in dollars per share)		$ 11.2
Issuance of common stock in exchange for debt (in shares)		0
Common stock, shares authorized	3,750,000