Fully diluted basis assuming vesting, percentage.

No definition available.

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Namespace Prefix:	IDT_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482099/360-10-50-1

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (a)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

+ Details

Name:	us-gaap_IncreaseDecreaseInAccountsReceivable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_SellingGeneralAndAdministrativeExpensesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RestatementAxis=srt_ScenarioPreviouslyReportedMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	srt_OwnershipAxis=IDT_NetTwophoneTwoZeroIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

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Namespace Prefix:
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Basis of Presentation (Details Narrative) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2024	Jan. 31, 2023
Depreciation and amortization		$ 5,000	$ 10,146	$ 9,801
Trade accounts receivable			7,040	(2,483)
Direct Cost of Revenues [Member]
Depreciation and amortization	$ 1,330	1,105	2,586	2,139
Selling, General and Administrative Expenses [Member]
Depreciation and amortization	$ 3,769	3,907	$ 7,560	7,662
Previously Reported [Member]
Trade accounts receivable				13,800
Previously Reported [Member] \| Direct Cost of Revenues [Member]
Depreciation and amortization		1,100		2,100
Previously Reported [Member] \| Selling, General and Administrative Expenses [Member]
Depreciation and amortization		$ 3,900		$ 7,700
net2phone 2.0, Inc. [Member]
Ownership percentage	94.00%		94.00%
Fully diluted basis assuming vesting, percentage			90.80%
National Retail Solutions [Member]
Ownership percentage	81.20%		81.20%
Fully diluted basis assuming vesting, percentage			78.90%