Schedule of Other Operating Gain (Expense), Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2021	Jul. 31, 2020
Other Income and Expenses [Abstract]
Corporate —Straight Path Communications Inc. class action insurance claims net of legal fees/(legal fees net of insurance claims)	$ 225	$ (531)
net2phone-UCaaS—other, net	(100)	(63)
Fintech—money transfer settlement	45
Traditional Communications—gain from sale of rights under class action lawsuit	2,000
Traditional Communications—net2phone indemnification claim	(472)	(1,244)
Traditional Communications—accrual for non-income related taxes related to a foreign subsidiary		(2,150)
Traditional Communications—other	(967)	(1,075)
TOTAL	$ 731	$ (5,063)