Schedule of Assets Measured at Fair Value On a Recurring Basis Using Significant Unobservable Inputs (Level 3) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021
Fair Value Disclosures [Abstract]
Balance, beginning of period	$ 2,119	$ 1,825	$ 2,465	$ 3,825
Purchase of Rafael Holdings, Inc. warrant		354		354
Redemption for Visa mandatory release assessment				(1,870)
Total gains (losses) recognized in “Other (expense) income, net”	142	140	(204)	10
Balance, end of period	2,261	2,319	2,261	2,319
Change in unrealized gains or losses for the period included in earnings for assets held at the end of the period