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Schedule of Accumulated Balances for Each Classification of Other Comprehensive (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2025	Jan. 31, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss			$ (18,142)
Other comprehensive (loss) income attributable to IDT Corporation	$ 110	$ (649)	(1,457)	$ (84)
Accumulated other comprehensive loss	(19,599)		(19,599)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss			(380)
Other comprehensive (loss) income attributable to IDT Corporation			72
Accumulated other comprehensive loss	(308)		(308)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss			(17,762)
Other comprehensive (loss) income attributable to IDT Corporation			(1,529)
Accumulated other comprehensive loss	$ (19,291)		$ (19,291)

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Amount before tax of increase (decrease) in accumulated equity from transactions and other events and circumstances from non-owner sources, including portion attributable to noncontrolling interest. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners (distributions to owners).

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