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Accumulated Other Comprehensive Income (Tables) | 9 Months Ended
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Apr. 30, 2015
Accumulated Other Comprehensive Income [Abstract] |
Schedule of accumulated balances for each classification of other comprehensive income (loss) |
|  | Unrealized Gain (Loss) on Available-for-Sale Securities |  |  | Foreign Currency Translation |  |  | Accumulated Other Comprehensive Income |
|  | (in thousands) |
Balance, July 31, 2014 |  | $ | (8 | ) |  | $ | 3,676 |  |  | $ | 3,668 |
Sale of interest in Fabrix Systems Ltd. |  |  | — |  |  |  | 102 |  |  |  | 102 |
Other comprehensive income (loss) attributable to IDT Corporation |  |  | 12 |  |  |  | (2,912 | ) |  |  | (2,900 | )
Balance, April 30, 2015 |  | $ | 4 |  |  | $ | 866 |  |  | $ | 870 |

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 + Details
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