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Summary of Changes in Equity Method Investments (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jul. 31, 2022
Jul. 31, 2021
Jul. 31, 2020
Schedule of Equity Method Investments [Line Items]      
Purchase of convertible preferred stock $ 1,051 $ 4,000
Equity in the net loss of investee (2,951) (1,099)
Equity Method Investee [Member]      
Schedule of Equity Method Investments [Line Items]      
Balance, beginning of period 2,901  
Purchase of convertible preferred stock 1,051 4,000  
Equity in the net loss of investee (2,224) (816)  
Amortization of equity method basis difference (727) (283)  
BALANCE, END OF PERIOD $ 1,001 $ 2,901