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Schedule of Other Operating (Expense) Gain, Net (Details) - USD ($) $ in Thousands | 3 Months Ended
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Oct. 31, 2024 | Oct. 31, 2023
Other Income and Expenses [Abstract] |  |
Corporate—Straight Path Communications Inc. class action legal fees |  | $ (212)
Corporate—Straight Path Communications Inc. class action insurance claims |  | 684
Corporate—other |  | 12
Total |  | $ 484

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- Definition Corporate other. + References No definition available. + Details
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Namespace Prefix: | IDT_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(6)) -SubTopic 10 -Topic 220 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition The net amount of other operating income and expenses, the components of which are not separately disclosed on the income statement, from items that are associated with the entity's normal revenue producing operations. + References No definition available. + Details
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- Definition Amount of insurance proceeds for an event or transaction that is unusual in nature or infrequent in occurrence, or both. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483613/220-20-50-1 + Details
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