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Other Operating Expense, Net (Details Narrative) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
May 08, 2023 | Apr. 30, 2024 | Apr. 30, 2023 | Apr. 30, 2024 | Apr. 30, 2023
Traditional Communications- increase in contingent consideration liability |  |  | $ 216 |  | $ 216
Traditional communications cable telephony customer indemnification claim |  |  | 3,912 |  | 3,925
Indemnification Agreement [Member] |  |  |  |  |
Traditional communications cable telephony customer indemnification claim | $ 3,900 |  |  |  |
Traditional Communications Segment [Member] |  |  |  |  |
Traditional Communications- increase in contingent consideration liability |  |  | $ 200 |  | $ 200

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- Definition Traditional communications cable telephony customer indemnification claim. + References No definition available. + Details
Name: | IDT_TraditionalCommunicationsCableTelephonyCustomerIndemnificationClaim
Namespace Prefix: | IDT_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Traditional communications contingent consideration liability. + References No definition available. + Details
Name: | IDT_TraditionalCommunicationsContingentConsiderationLiability
Namespace Prefix: | IDT_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_TypeOfArrangementAxis=IDT_IndemnificationAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=IDT_TraditionalCommunicationsSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |