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Rafael Holdings, Inc. Spin-Off (Tables) - Rafael Holdings, Inc. Spin-Off [Member] | 9 Months Ended
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Apr. 30, 2018
Schedule of assets and liabilities held for sale |
Cash and cash equivalents |  | $ | 9,287 |
Marketable securities |  |  | 32,989 |
Trade accounts receivable |  |  | 53 |
Other current assets |  |  | 2,329 |
Property, plant and equipment, net |  |  | 50,624 |
Investments |  |  | 17,650 |
Other assets |  |  | 2,240 |
Current liabilities |  |  | (159 | )
Other liabilities |  |  | (94 | )
Noncontrolling interests |  |  | (8,653 | )
Rafael equity |  | $ | 106,266 |
Schedule of consolidated statements of operations |
|  | Three Months Ended April 30, |  |  | Nine Months Ended April 30, |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
|  | (in thousands) |
(Loss) income before income taxes |  | $ | (1,190 | ) |  | $ | 52 |  |  | $ | (2,410 | ) |  | $ | 375 |
(Loss) income before income taxes attributable to IDT Corporation |  | $ | (1,062 | ) |  | $ | 52 |  |  | $ | (2,107 | ) |  | $ | 375 |

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