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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2020	Jul. 31, 2019
Statement of Financial Position [Abstract]
NET INCOME	$ 21,418	$ 330
Other comprehensive (loss) income:
Change in unrealized gain on available-for-sale securities	42	1
Foreign currency translation adjustments	(2,594)	80
Other comprehensive (loss) income	(2,552)	81
COMPREHENSIVE INCOME	18,866	411
Comprehensive loss (income) attributable to noncontrolling interests	12	(196)
COMPREHENSIVE INCOME ATTRIBUTABLE TO IDT CORPORATION	$ 18,878	$ 215

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