Quarterly report pursuant to Section 13 or 15(d)

Share-based compensation (Detail)

v2.4.0.6
Share-based compensation (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended
Oct. 31, 2012
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Cost (in Dollars) $ 0.5
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Outstanding Weighted Average Remaining Contractual Terms 1 year
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 2,658,000