Summary of Changes in Equity Method Investments (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2022	Oct. 31, 2021
Schedule of Equity Method Investments [Line Items]
Purchase of convertible preferred stock		$ 1,051
Equity in the net loss of investee	(652)	(623)
Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Balance, beginning of period	1,001	2,901
Purchase of convertible preferred stock		1,051
Equity in the net loss of investee	(470)	(441)
Amortization of equity method basis difference	(182)	(182)
Balance, end of period	$ 349	$ 3,329