Schedule of Equity Investments (Details) - USD ($) $ in Thousands	Apr. 30, 2022	Jul. 31, 2021
Current equity investments	$ 16,179	$ 42,434
Noncurrent equity investments	7,319	11,654
Other Marketable Equity Securities [Member]
Current equity investments	3,048	3,630
Mutual Fund [Member]
Current equity investments	12,290	23,467
Hedge Funds [Member]
Noncurrent equity investments	2,619	3,563
Other Investments [Member]
Noncurrent equity investments	825	2,725
Common Class B [Member] | Zedge Inc [Member]
Current equity investments	217	649
Common Class B [Member] | Rafael Holdings Inc. [Member]
Current equity investments	624	12,479
Restricted Common Class B [Member] | Rafael Holdings Inc. [Member]
Current equity investments		2,209
Series C Convertible Preferred Stock [Member] | Visa Inc [Member]
Noncurrent equity investments	2,131	2,465
Series B And Series C Convertible Preferred Stock [Member]
Noncurrent equity investments	$ 1,744	$ 2,901