Annual report pursuant to Section 13 and 15(d)

Income taxes (Detail) - Net deferred tax liabilities are included in the consolidated balance sheets

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Income taxes (Detail) - Net deferred tax liabilities are included in the consolidated balance sheets (USD $)
In Thousands, unless otherwise specified
Jul. 31, 2012
Jul. 31, 2011
Deferred taxes:    
Non-current $ 938 $ 2,934
$ 938 $ 2,934