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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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