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DEBT - Net Carrying Value of the Notes (Detail) - USD ($)
$ in Thousands
Jul. 31, 2021
Jul. 31, 2020
Debt Instrument [Line Items]    
Carrying amount of equity component $ 8,200 $ 8,200
Total debt, net 9,147 7,720
SPHG Holdings | Convertible Notes Payable    
Debt Instrument [Line Items]    
Principal amount of note 14,940 14,940
Unamortized debt discount (5,597) (6,886)
Total debt, net $ 9,343 $ 8,054