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Fair Value Measurements (Details Narrative) - USD ($) $ in Millions	3 Months Ended
	Oct. 31, 2023	Oct. 31, 2024	Jul. 31, 2024
Fair Value Disclosures [Abstract]
Investment in hedge funds		$ 2.9	$ 2.9
Contingent consideration payment	$ 0.2

X

- Definition

Investment in hedge funds.

+ References

No definition available.

+ Details

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Namespace Prefix:	IDT_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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X

- Definition

Amount of cash outflow, made soon after acquisition date of business combination, to settle contingent consideration liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 13
-Subparagraph (d)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-13

+ Details

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