Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2022	Oct. 31, 2021
Income Statement [Abstract]
Net income (loss)	$ 12,555	$ (2,345)
Other comprehensive (loss) income:
Change in unrealized gain on available-for-sale securities	(222)	(111)
Foreign currency translation adjustments	(145)	1,068
Other comprehensive (loss) income	(367)	957
Comprehensive income (loss)	12,188	(1,388)
Comprehensive (income) attributable to noncontrolling interests	(1,553)	(133)
Comprehensive income (loss) attributable to IDT Corporation	$ 10,635	$ (1,521)