v2.4.0.6
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Business Segment Information - Additional Information (Detail) (USD $)
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3 Months Ended |
12 Months Ended |
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Segment
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| Segment Reporting Disclosure [Line Items] |
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| Number of reportable segments |
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2 |
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| Estimated losses from pending litigation |
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$ 6,468,000 |
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| Gain from litigation |
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1,750,000 |
|
418,000 |
| (Loss) gain on settlement of litigation |
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(11,252,000) |
|
10,000,000 |
| Termination expense |
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14,400,000 |
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14,375,000 |
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| Patent expense |
1,100,000 |
9,800,000 |
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10,828,000 |
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| Gain on sale of wireless spectrum license |
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5,330,000 |
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| Insurance claims |
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2,637,000 |
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| Gain (loss) on settlement of other claims |
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600,000 |
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640,000 |
(1,500,000) |
| Proceeds on insurance related to water damages |
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485,000 |
| Gain on sale of asset |
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681,000 |
| Percentage of revenue from external customers |
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29.00% |
32.00% |
34.00% |
| Net long-lived assets |
4,500,000 |
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3,900,000 |
4,500,000 |
4,300,000 |
| Total assets held outside United states |
137,300,000 |
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140,900,000 |
137,300,000 |
107,300,000 |
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UNITED KINGDOM
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| Segment Reporting Disclosure [Line Items] |
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| Percentage of revenue from external customers |
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14.00% |
13.00% |
12.00% |
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Telecom Platform Services [Member]
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| Segment Reporting Disclosure [Line Items] |
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| Estimated losses from pending litigation |
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6,500,000 |
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| (Loss) gain on settlement of litigation |
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|
10,000,000 |
| Termination expense |
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14,400,000 |
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| Patent expense |
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10,800,000 |
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Broadstripe LLC [Member]
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| Segment Reporting Disclosure [Line Items] |
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| Gain from litigation |
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1,800,000 |
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T Mobile [Member]
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| Segment Reporting Disclosure [Line Items] |
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| (Loss) gain on settlement of litigation |
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(11,000,000) |
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Other Services [Member]
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| Segment Reporting Disclosure [Line Items] |
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| Gain from litigation |
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400,000 |
| Operating gains (losses) |
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200,000 |
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All Other [Member]
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| Segment Reporting Disclosure [Line Items] |
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| Gain on sale of wireless spectrum license |
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5,300,000 |
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| Insurance claims |
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2,600,000 |
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| Gain (loss) on settlement of other claims |
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$ 600,000 |
$ 1,500,000 |
| X |
- Definition
Entity Wide Disclosure On Geographical Areas Percentage of Revenue from External Customers Attributed to Foreign Countries.
+ References+ Details
| Name: |
idt_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributedToForeignCountriesPercentage |
| Namespace Prefix: |
idt_ |
| Data Type: |
num:percentItemType |
| Balance Type: |
na |
| Period Type: |
duration |
|
| X |
- Definition
Entity Wide Disclosure On Geographic Areas Total Assets Attributed To Foreign Countries
+ References+ Details
| Name: |
idt_EntityWideDisclosureOnGeographicAreasTotalAssetsAttributedToForeignCountries |
| Namespace Prefix: |
idt_ |
| Data Type: |
xbrli:monetaryItemType |
| Balance Type: |
debit |
| Period Type: |
instant |
|
| X |
- Definition
Gain Loss on Disposition of Subsidiary
+ References+ Details
| Name: |
idt_GainLossOnDispositionOfSubsidiary |
| Namespace Prefix: |
idt_ |
| Data Type: |
xbrli:monetaryItemType |
| Balance Type: |
credit |
| Period Type: |
duration |
|
| X |
- Definition
Gain On Insurance Settlement
+ References+ Details
| Name: |
idt_GainOnInsuranceSettlement |
| Namespace Prefix: |
idt_ |
| Data Type: |
xbrli:monetaryItemType |
| Balance Type: |
credit |
| Period Type: |
duration |
|
| X |
- Definition
Legal Settlement Reflect Current Estimated Range Of Loss
+ References+ Details
| Name: |
idt_LegalSettlementReflectCurrentEstimatedRangeOfLoss |
| Namespace Prefix: |
idt_ |
| Data Type: |
xbrli:monetaryItemType |
| Balance Type: |
debit |
| Period Type: |
duration |
|
| X |
- Definition
Patent Litigation Expense
+ References+ Details
| Name: |
idt_PatentLitigationExpense |
| Namespace Prefix: |
idt_ |
| Data Type: |
xbrli:monetaryItemType |
| Balance Type: |
debit |
| Period Type: |
duration |
|
| X |
- Details
| Name: |
idt_SegmentReportingDisclosureLineItems |
| Namespace Prefix: |
idt_ |
| Data Type: |
xbrli:stringItemType |
| Balance Type: |
na |
| Period Type: |
duration |
|
| X |
- Definition
Amount of long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets, located in foreign countries in total in which the entity holds assets.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 131
-Paragraph 38
-Subparagraph b(2)
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
+ Details
| Name: |
us-gaap_EntityWideDisclosureOnGeographicAreasLongLivedAssetsInForeignCountries |
| Namespace Prefix: |
us-gaap_ |
| Data Type: |
xbrli:monetaryItemType |
| Balance Type: |
debit |
| Period Type: |
instant |
|
| X |
- Definition
Gain (loss) related to the termination of a contract between the parties. The termination may be due to many causes including early termination of a lease by a lessee, a breach of contract by one party, or a failure to perform.
+ References+ Details
| Name: |
us-gaap_GainLossOnContractTermination |
| Namespace Prefix: |
us-gaap_ |
| Data Type: |
xbrli:monetaryItemType |
| Balance Type: |
credit |
| Period Type: |
duration |
|
| X |
- Definition
The gains (losses) included in results of operations resulting from the sale or disposal of property, plant and equipment, which do not qualify for treatment as discontinued operations. This item does not include any gain (loss) recognized on the sale of oil and gas property or timber property.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 37, 41, 42, 43, 45
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2941-110230
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760
Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2443-110228
+ Details
| Name: |
us-gaap_GainLossOnDispositionOfProperty |
| Namespace Prefix: |
us-gaap_ |
| Data Type: |
xbrli:monetaryItemType |
| Balance Type: |
credit |
| Period Type: |
duration |
|
| X |
- Definition
The gains (losses) included in results of operations resulting from the sale or disposal of other assets.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 28
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
+ Details
| Name: |
us-gaap_GainLossOnSaleOfOtherAssets |
| Namespace Prefix: |
us-gaap_ |
| Data Type: |
xbrli:monetaryItemType |
| Balance Type: |
credit |
| Period Type: |
duration |
|
| X |
- Definition
Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.
+ References+ Details
| Name: |
us-gaap_NumberOfReportableSegments |
| Namespace Prefix: |
us-gaap_ |
| Data Type: |
xbrli:integerItemType |
| Balance Type: |
na |
| Period Type: |
duration |
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