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) 50,000,000 50,000,000
Common stock, shares issued (in shares) 25,566,332 25,364,608
Common stock, shares outstanding (in shares) 25,566,332 25,364,608