Schedule of Other Operating (Expense) Gain, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021
Component of Operating Other Cost and Expense [Abstract]
Fintech—other	$ 13	$ 45	$ 13	$ 45
net2phone-UCaaS—write-off of contingent consideration liability			303
net2phone-UCaaS—other			(10)	(100)
Traditional Communications—gain from sale of rights under class action lawsuit				2,000
Traditional Communications—net2phone indemnification claim	(33)	(55)	(68)	(442)
Traditional Communications—IDT Global settlement				(554)
Traditional Communications—other	(1)		(5)
Total other operating (expense) gain, net	(179)	595	(709)	1,550
Straight Path [Member]
Component of Operating Other Cost and Expense [Abstract]
Corporate—Straight Path Communications Inc. class action legal fees	(1,410)	(299)	(5,081)	(2,017)
Corporate—Straight Path Communications Inc. class action insurance claims	$ 1,252	$ 904	$ 4,139	$ 2,618