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Accumulated Other Comprehensive Loss (Tables) | 9 Months Ended
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Apr. 30, 2022
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Schedule of Accumulated Balances for Each Classification of Other Comprehensive Loss | The accumulated balances for each classification of other comprehensive loss were as follows: Schedule of Accumulated Balances for Each Classification of Other Comprehensive Loss
|  | Unrealized Loss on Available-for-Sale Securities |  |  | Foreign Currency Translation |  |  | Accumulated Other Comprehensive Loss |
|  | (in thousands) |
Balance, July 31, 2021 |  | $ | (9 | ) |  | $ | (10,174 | ) |  | $ | (10,183 | )
Other comprehensive loss attributable to IDT Corporation |  |  | (547 | ) |  |  | (611 | ) |  |  | (1,158 | )
Balance, April 30, 2022 |  | $ | (556 | ) |  | $ | (10,785 | ) |  | $ | (11,341 | )

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