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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Nov. 30, 2013	Aug. 31, 2013
Statement Of Financial Position [Abstract]
Trade accounts receivable, allowance for doubtful accounts	$ 735	$ 540
Common stock, shares authorized	36,000,000	36,000,000
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares issued	19,459,734	19,392,979
Common stock, shares outstanding	15,274,308	15,285,536
Treasury stock, shares	4,185,426	4,107,443

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A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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