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IDT Financial Services Holding Limited Assets and Liabilities Held for Sale (Details Textual) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Jul. 31, 2017 | Jul. 31, 2016
IDT Financial Services Holding Limited Assets and Liabilities Held for Sale (Textual) |  |
Allowance for doubtful accounts | $ 2,550 | $ 861
Net asset value | 14,000 |
Property, plant and equipment, net of accumulated depreciation | 228 | 213
Other intangibles, net of accumulated amortization | 57 | $ 37
IDT Financial Services Holding Limited [Member] |  |
IDT Financial Services Holding Limited Assets and Liabilities Held for Sale (Textual) |  |
Outstanding equity interests | $ 3,800 |

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- Definition Amount of net assets (liabilities). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 225 -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-09(6)) -URI http://asc.fasb.org/extlink&oid=6488393&loc=d3e606914-122999 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section S99 -Paragraph 2 -Subparagraph (SX 210.6-05(4)) -URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e604008-122996 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 205 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=79984436&loc=d3e9915-115836 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77885760&loc=SL35686385-199418 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 225 -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-09(7)) -URI http://asc.fasb.org/extlink&oid=6488393&loc=d3e606914-122999 + Details
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