Equity Investments (Details) - Schedule of equity investments - USD ($) $ in Thousands	Oct. 31, 2020	Jul. 31, 2020
Equity Investments (Details) - Schedule of equity investments [Line Items]
Current equity investments	$ 21,036	$ 5,964
Noncurrent equity investments	9,748	8,833
Mutual funds [Member]
Equity Investments (Details) - Schedule of equity investments [Line Items]
Current equity investments	20,427	5,516
Hedge funds [Member]
Equity Investments (Details) - Schedule of equity investments [Line Items]
Noncurrent equity investments	3,427	4,783
Other [Member]
Equity Investments (Details) - Schedule of equity investments [Line Items]
Noncurrent equity investments	2,225	225
Common Stock Class B [Member] | Zedge, Inc. [Member]
Equity Investments (Details) - Schedule of equity investments [Line Items]
Current equity investments	144	59
Common Stock Class B [Member] | Rafael Holdings, Inc [Member]
Equity Investments (Details) - Schedule of equity investments [Line Items]
Current equity investments	465	389
Visa Series C Preferred [Member]
Equity Investments (Details) - Schedule of equity investments [Line Items]
Noncurrent equity investments	1,825	3,825
Visa Series A Preferred [Member]
Equity Investments (Details) - Schedule of equity investments [Line Items]
Noncurrent equity investments	$ 2,271