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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Detail) - Schedule of components of inventory (USD $) In Thousands, unless otherwise specified	Jan. 31, 2013	Jan. 31, 2012
Ethanol and other finished goods	$ 7,306	$ 5,318
Work in process	4,414	3,819
Grain and other raw materials	13,199	21,212
Total	$ 24,919	$ 30,349

Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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