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Rafael Holdings, Inc. Spin-Off (Tables) - Rafael Holdings Inc. Spin Off [Member] | 12 Months Ended
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Jul. 31, 2018
Schedule of assets and liabilities held for sale |
(in thousands) |  |  |
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 |
Year ended July 31 (in thousands) |  | 2018 |  |  | 2017 |  |  | 2016 |
(LOSS) INCOME BEFORE INCOME TAXES |  | $ | (2,410 | ) |  | $ | 520 |  |  | $ | 1,258 |
(LOSS) INCOME BEFORE INCOME TAXES ATTRIBUTABLE TO IDT CORPORATION |  | $ | (2,107 | ) |  | $ | 517 |  |  | $ | 1,258 |
Schedule of consolidated balance sheets |
July 31 (in thousands) |  | 2018 |  |  | 2017 |
Convertible promissory note (at fair value) |  | $ | — |  |  | $ | 6,300 |
Warrants (at cost) |  |  | — |  |  |  | 5,400 |
Right to receive additional shares (at cost) |  |  | — |  |  |  | 400 |
Total investment in Rafael Pharma |  | $ | — |  |  | $ | 12,100 |

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