XML 120 R106.htm IDEA: XBRL DOCUMENT v3.20.2

Related Party Transactions (Details) - USD ($)		12 Months Ended
	Jun. 02, 2020	Jul. 31, 2020	Jul. 31, 2019	Aug. 31, 2020
Related Party Transactions (Details) [Line Items]
Lease expiration description		The latest lease, which became effective November 1, 2012, had a one-year term with a one-year renewal option.
Annual rent payment	$ 18,600	$ 60,900
Outstanding net loan receivable from employees		$ 200,000	$ 200,000
Zedge Inc [Member]
Related Party Transactions (Details) [Line Items]
Shares held (in Shares)		42,282	42,282
Jonas Media Group [Member] | Subsequent Event [Member]
Related Party Transactions (Details) [Line Items]
Receivable from subsidiaries included in other current assets				$ 16,000
Receivable from subsidiaries included in adjusted amount				$ (14,000)
Mason and Co [Member]
Related Party Transactions (Details) [Line Items]
Commissions and fees from payment by company		$ 63,000	$ 24,000
Rafael Spin Off [Member]
Related Party Transactions (Details) [Line Items]
Cost and expenses related to services		400,000	400,000
Cash collected from third party tenants		200,000
Receivable from subsidiaries included in other current assets		$ 50,000	$ 100,000
Shares held (in Shares)		27,806	27,419
Jonas Media Group [Member]
Related Party Transactions (Details) [Line Items]
Receivable from subsidiaries included in other current assets		$ 30,000	$ 15,000
Receivable from subsidiaries included in services		15,000	15,000
IGM Brokerage Corp. [Member]
Related Party Transactions (Details) [Line Items]
Commissions and fees from payment by company			29,000
Genie and Subsidiaries [Member]
Related Party Transactions (Details) [Line Items]
Cost and expenses related to services		1,100,000	1,000,000.0
Receivable from subsidiaries included in other current assets		$ 200,000	$ 200,000

X

- Definition

Description of lease expiration.

+ References

No definition available.

+ Details

Name:	idt_LeaseExpirationDescription
Namespace Prefix:	idt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The Number of related party shares received in connection with restricted stock.

+ References

No definition available.

+ Details

Name:	idt_NumberOfRelatedPartySharesReceivesInConnectionWithRestrictedStock
Namespace Prefix:	idt_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

This amount for related party transaction billings adjustment to related party for services.

+ References

No definition available.

+ Details

Name:	idt_RelatedPartyTransactionBillingsAdjustmentToRelatedPartyForServices
Namespace Prefix:	idt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Related party transaction billings to related party for services.

+ References

No definition available.

+ Details

Name:	idt_RelatedPartyTransactionBillingsToRelatedPartyForServices
Namespace Prefix:	idt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Related party transaction lease annual rent payments to related party.

+ References

No definition available.

+ Details

Name:	idt_RelatedPartyTransactionLeaseAnnualRentPaymentsToRelatedParty
Namespace Prefix:	idt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Related party transactions cash collected from third party tenants.

+ References

No definition available.

+ Details

Name:	idt_RelatedPartyTransactionsCashCollectedFromThirdPartyTenants
Namespace Prefix:	idt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	idt_RelatedPartyTransactionsDetailsLineItems
Namespace Prefix:	idt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Costs of sales and operating expenses for the period incurred from transactions with related parties.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2)
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

+ Details

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

X

- Definition

Amounts due from an Entity employee, not to include stockholders or officers, which are usually due within 1 year (or 1 business cycle).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(k)(1))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3(a)(2))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39599-107864

+ Details

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

X

- Definition

Amount receivable from related parties classified as other, due within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3(a)(2))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(k)(1))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

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

X

- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

+ Details

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

X

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=idt_ZedgeIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=idt_JonasMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=idt_MasonAndCompanyConsultingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=idt_RafaelSpinOffMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=idt_JonasMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=idt_IgmBrokerageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=idt_GenieAndSubsidiarieMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: