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Noncontrolling Interest - Reconciles Shareholders' Equity Attributable to Noncontrolling Interest (Detail) - Jul. 31, 2014 - USD ($)
$ in Thousands
Total
Total
Noncontrolling Interest [Line Items]    
Net loss attributable to noncontrolling interest of Salsa Lisa $ (60) $ (506)
Salsa Lisa noncontrolling interest [Member]    
Noncontrolling Interest [Line Items]    
Noncontrolling interest, beginning (104) (57)
Net loss attributable to noncontrolling interest of Salsa Lisa (42) (89)
Noncontrolling interest, ending $ (146) $ (146)