XML 78 R67.htm IDEA: XBRL DOCUMENT v3.21.2

Schedule of Assets Measured at Fair Value On a Recurring Basis Using Significant Unobservable Inputs (Level 3) (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
Fair Value Disclosures [Abstract]
Balance, beginning of period	$ 2,465	$ 3,825
Redemption for Visa mandatory release assessment		(1,870)
Total losses included in "Other expense, net"	(346)	(130)
Balance, end of period	2,119	1,825
Change in unrealized gains or losses for the period included in earnings for assets held at the end of the period

X

- Definition

Amount of change in unrealized gains or losses included in earnings for assets held at end of period.

+ References

No definition available.

+ Details

Name:	IDT_AmountOfChangeInUnrealizedGainsOrLossesIncludedInEarningsForAssetsHeldAtEndOfPeriod
Namespace Prefix:	IDT_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Redemption for Visa mandatory release assessment

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

Name:	us-gaap_FairValueDisclosuresAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant