Schedule of Carrying Value of Equity Investments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021
Cash and Cash Equivalents [Abstract]
Balance, beginning of period	$ 2,397	$ 2,109	$ 2,743	$ 4,109
Redemption for Visa mandatory release assessment				(1,870)
Adjustment for observable transactions involving a similar investment from the same issuer	142	114	(204)	(16)
Impairments
Balance, end of the period	$ 2,539	$ 2,223	$ 2,539	$ 2,223