Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	May 31, 2013	May 31, 2012
Cash flows from operating activities:
Net income (loss)	$ 4,956	$ (5,200)
Adjustments to reconcile net income (loss) to net cash provided by operations:
Depreciation and amortization	10,128	10,718
Loss on redemption of Series A Preferred Stock		2,777
Non-cash interest on Series A Preferred Stock		1,838
Stock-based compensation	1,102	893
Loss on sale of fixed assets	12	29
Deferred income tax expense	2,845	4,967
Non-cash loss on hedging transactions	1,913	3,764
Excess tax benefit from stock-based compensation	(46)
Other		20
Change in assets and liabilities:
Trade accounts receivable	(2,591)	(3,498)
Prepaid expenses	(1,443)	(1,886)
Inventories	(2,910)	(1,270)
Increase in margin accounts	(3,009)	(453)
Accounts payable and accrued liabilities	(855)	(2,029)
Income tax receivable	(14)	(389)
Pension benefit liability	754	(1,363)
Other receivables	2,171	(700)
Payment of interest on Series A Preferred Stock, net		(2,191)
Other	1,567	607
Net cash flow provided by operating activities	14,580	6,634
Cash flows from investing activities:
Acquisition of property, plant and equipment, net	(8,308)	(9,252)
Settlement of ethanol construction claim (Note 13)	2,106
Acquisition of Carolina Starches, net of cash acquired		(8,347)
Other	1	21
Net cash used in investing activities	(6,201)	(17,578)
Cash flows from financing activities:
Proceeds from revolving line of credit	18,200	48,250
Payments on revolving line of credit	(23,800)	(22,200)
Payments of long-term debt	(150)	(150)
Redemption of Series A preferred stock		(16,500)
Payments under capital lease obligation	(209)	(184)
Proceeds from financing arrangements	2,019	2,255
Payments on financing arrangements	(893)	(1,299)
Exercise of stock options	293
Excess tax benefit from stock-based compensation	46
Increase (decrease) in cash overdraft	(3,781)	1,123
Other	(1)	27
Net cash provided by (used in) financing activities	(8,276)	11,322
Increase in cash and cash equivalents	103	378
Cash and cash equivalents, beginning of period	154	281
Cash and cash equivalents, end of period	$ 257	$ 659