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Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013
Commitments and Contingencies (Textual)
Purchase commitment of company	$ 2,800
Rental expense under operating leases	6,100	$ 6,400	$ 5,900
Connectivity charges under operating leases	8,400	10,400	$ 11,800
Letters of credit outstanding	3,200
Performance bonds outstanding	11,300
Refundable customer deposits	84,454	62,685
IDT Financial Services [Member]
Commitments and Contingencies (Textual)
Refundable customer deposits	84,400	62,700
IDT Payment Services and IDT Financial Services [Member]
Commitments and Contingencies (Textual)
Restricted cash and cash equivalents	$ 7,500	$ 12,900
Expire on July 31, 2016 [Member]
Commitments and Contingencies (Textual)
Letters of credit expiration date	Jul. 31, 2016

X

- Definition

The carrying amounts of cash and cash equivalent substantially restricted.

+ References

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- Definition

Commitments and contingencies.

+ References

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- Definition

The amount of expenses on connectivity charges on operating leases.

+ References

No definition available.

+ Details

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- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

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- Definition

In certain circumstances, the company is required to provide performance bonds in connection with its contractual commitments. Company has indemnified the surety for any expenses paid out under these performance bonds.

+ References

No definition available.

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- Definition

The current portion of money or property received from customers which is either to be returned upon satisfactory contract completion or applied to customer receivables in accordance with the terms of the contract or the understandings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



-SubTopic 10



-Section S99



-Paragraph 1



-Subparagraph (SX 210.5-02.20)



-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

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- Definition

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 840



-SubTopic 20



-Section 50



-Paragraph 1



-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717

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- Definition

Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

+ References

No definition available.

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