Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021
Income Statement [Abstract]
Net income	$ 5,106	$ 36,398	$ 11,017	$ 58,018
Other comprehensive (loss) income:
Change in unrealized loss on available-for-sale securities	(224)	(180)	(547)	(163)
Foreign currency translation adjustments	(29)	747	(611)	(817)
Other comprehensive (loss) income	(253)	567	(1,158)	(980)
Comprehensive income	4,853	36,965	9,859	57,038
Comprehensive (income) attributable to noncontrolling interests	(335)	(50)	(1,231)	(274)
Comprehensive income attributable to IDT Corporation	$ 4,518	$ 36,915	$ 8,628	$ 56,764