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Equity (Tables) | 9 Months Ended
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Apr. 30, 2018
Equity [Abstract] |
Summary of changes in the components of equity |
|  | Nine Months Ended April 30, 2018 |
|  | Attributable to IDT Corporation |  |  | Noncontrolling Interests |  |  | Total |
|  | (in thousands) |
Balance, July 31, 2017 |  | $ | 145,734 |  |  | $ | 8,823 |  |  | $ | 154,557 |
Dividends declared ($0.47 per share) |  |  | (11,677 | ) |  |  | — |  |  |  | (11,677 | )
Restricted Class B common stock purchased from employees |  |  | (61 | ) |  |  | — |  |  |  | (61 | )
Transfer of right to receive equity to Howard S. Jonas |  |  | — |  |  |  | (40 | ) |  |  | (40 | )
Consolidation of Lipomedix Pharmaceuticals Ltd. |  |  | — |  |  |  | 558 |  |  |  | 558 |
Distributions to noncontrolling interests |  |  | — |  |  |  | (1,023 | ) |  |  | (1,023 | )
Rafael Spin-Off |  |  | (106,266 | ) |  |  | (8,653 | ) |  |  | (114,919 | )
Stock-based compensation |  |  | 2,842 |  |  |  | — |  |  |  | 2,842 |
Comprehensive loss: |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  |  | (4,034 | ) |  |  | 698 |  |  |  | (3,336 | )
Other comprehensive income |  |  | 16 |  |  |  | — |  |  |  | 16 |
Comprehensive loss |  |  | (4,018 | ) |  |  | 698 |  |  |  | (3,320 | )
Balance, April 30, 2018 |  | $ | 26,554 |  |  | $ | 363 |  |  | $ | 26,917 |

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- Definition Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) and of the changes in the number of shares of equity securities during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644 + Details
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