Schedule of Net Income and Aggregate Funding Repaid to the Company by VIE (Details) - USD ($) $ in Thousands	3 Months Ended
Oct. 31, 2022	Oct. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Net income of the VIE	$ 140	$ 144
Aggregate funding provided by (repaid to) the Company, net	$ 97	$ (3)

Variable interest entity aggregate funding repaid to provided by reporting entity.

No definition available.

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