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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Feb. 28, 2015	Aug. 31, 2014
Statement Of Financial Position [Abstract]
Trade and other accounts receivable, allowance for doubtful accounts	$ 523us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent	$ 406us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Common stock, shares authorized	36,000,000us-gaap_CommonStockSharesAuthorized	36,000,000us-gaap_CommonStockSharesAuthorized
Common stock, par value	$ 0.001us-gaap_CommonStockParOrStatedValuePerShare	$ 0.001us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares issued	19,508,893us-gaap_CommonStockSharesIssued	19,464,310us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	14,598,538us-gaap_CommonStockSharesOutstanding	14,754,362us-gaap_CommonStockSharesOutstanding
Treasury stock, shares	4,910,355us-gaap_TreasuryStockShares	4,709,948us-gaap_TreasuryStockShares

X

- Definition

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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-Publisher SEC

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-Name Accounting Standards Codification

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Face amount or stated value per share of common stock.

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X

- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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- Definition

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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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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