Summary of Changes in Equity Method Investments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021
Schedule of Equity Method Investments [Line Items]
Purchase of convertible preferred stock			$ 1,051
Equity in the net loss of investee	$ (820)		(1,443)
Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Balance, beginning of period	3,329		2,901
Purchase of convertible preferred stock			1,051
Equity in the net loss of investee	(639)		(1,080)
Amortization of equity method basis difference	(181)		(363)
Balance, end of the period	$ 2,509		$ 2,509