Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jan. 31, 2015	Jul. 31, 2014
Current assets
Accounts receivable, allowance for doubtful accounts	$ 646	$ 722
Stockholders' equity
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	50,000,000us-gaap_CommonStockSharesAuthorized	50,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued (in shares)	25,566,332us-gaap_CommonStockSharesIssued	25,364,608us-gaap_CommonStockSharesIssued
Common stock, shares outstanding (in shares)	25,566,332us-gaap_CommonStockSharesOutstanding	25,364,608us-gaap_CommonStockSharesOutstanding

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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