Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Oct. 31, 2014	Jul. 31, 2014
Current assets
Accounts receivable, allowance for doubtful accounts	$ 700	$ 722
Stockholders' equity
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	25,363,693	25,364,608
Common stock, shares outstanding (in shares)	25,363,693	25,364,608