Quarterly report pursuant to Section 13 or 15(d)

Share-based compensation (Detail) - Schedule of share-based compensation expense

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Share-based compensation (Detail) - Schedule of share-based compensation expense (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jan. 31, 2013
Jan. 31, 2012
Jan. 31, 2013
Jan. 31, 2012
Stock Based Compensation Expense $ 160 $ 217 $ 301 $ 430
Options [Member]
       
Stock Based Compensation Expense 15   15  
Restricted Stocks [Member]
       
Stock Based Compensation Expense $ 145 $ 217 $ 286 $ 430