Earnings (Loss) Per Common Share - Reconciliation of Income from Operations Applicable to Common Shares and Computation of Diluted Weighted Average Shares Outstanding (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Aug. 31, 2013	May 31, 2013	Feb. 28, 2013	Nov. 30, 2012	Aug. 31, 2012	May 31, 2012	Feb. 29, 2012	Nov. 30, 2011	Aug. 31, 2013	Aug. 31, 2012	Aug. 31, 2011
Numerator:
Net income (loss)	$ (949)	$ 2,058	$ 1,191	$ 1,707	$ (4,366)	$ (5,452)	$ (340)	$ 592	$ 4,007	$ (9,566)	$ (5,117)
Less: Allocation to participating securities									(11)
Net income (loss) applicable to common shares and equivalents									$ 3,996	$ (9,566)	$ (5,117)
Denominator:
Weighted average common shares and equivalents outstanding, basic									12,369,487	12,293,749	12,250,914
Dilutive stock options and awards									249,000
Weighted average common shares and equivalents outstanding, diluted									12,618,158	12,293,749	12,250,914