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Note 14 - Derivative Instruments and Fair Value Measurements (Detail) - Fair Value of the Company's Derivatives and Location in Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011
Corn Derivatives [Member] \| Fair Value, Inputs, Level 1 [Member]
Asset Derivatives	$ 1,091
Liabilities Derivatives	(974)
Corn Derivatives [Member]
Asset Derivatives	1,091
Liabilities Derivatives	(974)
Ethanol Derivatives [Member] \| Fair Value, Inputs, Level 1 [Member]
Asset Derivatives	213
Liabilities Derivatives	(2,491)
Ethanol Derivatives [Member]
Asset Derivatives	213
Liabilities Derivatives	$ (2,491)

Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

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- Definition

Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

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