Other Operating Expense, Net (Details) - Schedule of other operating expense, net - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Schedule of other operating expense, net [Abstract]
Corporate—Straight Path Communications Inc. class action insurance claims net of legal fees/(legal fees net of insurance claims)	$ 302	$ (260)
Traditional Communications—Carrier Services settlement	(554)
Traditional Communications—net2phone indemnification claim		(365)
Traditional Communications—accrual for non-income related taxes related to a foreign subsidiary		(2,150)
Total other operating expense, net	$ (252)	$ (2,775)