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Summary of Changes in Equity Method Investments (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Apr. 30, 2023
Apr. 30, 2022
Apr. 30, 2023
Apr. 30, 2022
Defined Benefit Plan Disclosure [Line Items]        
Purchase of convertible preferred stock     $ 168 $ 1,051
Conversion of secured promissory notes into convertible preferred stock     4,038
Equity in the net loss of investee $ (768) $ (765) (2,143) (2,208)
Equity Method Investee [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Balance, beginning of period (374) 2,509 1,001 2,901
Purchase of convertible preferred stock 168 168 1,051
Conversion of secured promissory notes into convertible preferred stock 4,038 4,038
Equity in the net loss of investee (532) (583) (1,544) (1,662)
Amortization of equity method basis difference (236) (182) (599) (546)
Balance, end of the period $ 3,064 $ 1,744 $ 3,064 $ 1,744