Equity Investments (Details) - Schedule of equity investments (Parentheticals) - Common Stock Class B [Member] - shares	6 Months Ended	12 Months Ended
	Jan. 31, 2021	Jul. 31, 2020
Zedge, Inc. [Member]
Equity Investments (Details) - Schedule of equity investments (Parentheticals) [Line Items]
Class B common stock, shares	42,282	42,282
Rafael Holdings, Inc [Member]
Equity Investments (Details) - Schedule of equity investments (Parentheticals) [Line Items]
Class B common stock, shares	28,320	27,806