Equity Investments (Details) - Schedule of equity investments - USD ($) $ in Thousands	Jan. 31, 2021	Jul. 31, 2020
Equity Investments (Details) - Schedule of equity investments [Line Items]
Current equity investments	$ 24,346	$ 5,964
Noncurrent equity investments	10,441	8,833
Fixed income mutual funds [Member]
Equity Investments (Details) - Schedule of equity investments [Line Items]
Current equity investments	23,374	5,516
Other [Member]
Equity Investments (Details) - Schedule of equity investments [Line Items]
Noncurrent equity investments	2,225	225
Hedge funds [Member]
Equity Investments (Details) - Schedule of equity investments [Line Items]
Noncurrent equity investments	3,481	4,783
Rafael Holdings, Inc. warrant [Member] | Other [Member]
Equity Investments (Details) - Schedule of equity investments [Line Items]
Noncurrent equity investments	380
Common Stock Class B [Member] | Zedge, Inc. [Member]
Equity Investments (Details) - Schedule of equity investments [Line Items]
Current equity investments	307	59
Common Stock Class B [Member] | Rafael Holdings, Inc. warrant [Member]
Equity Investments (Details) - Schedule of equity investments [Line Items]
Current equity investments	665	389
Visa Series C Preferred [Member]
Equity Investments (Details) - Schedule of equity investments [Line Items]
Noncurrent equity investments	1,939	3,825
Visa Series A Preferred [Member]
Equity Investments (Details) - Schedule of equity investments [Line Items]
Noncurrent equity investments	$ 2,416