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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, 2018	Jul. 31, 2017
IDT Financial Services Holding Limited Assets and Liabilities Held for Sale (Textual)
Property, plant and equipment, net of accumulated depreciation	$ 346	$ 228
Other intangibles, net of accumulated amortization	86	57
IDT Financial Services Holding Limited [Member]
IDT Financial Services Holding Limited Assets and Liabilities Held for Sale (Textual)
Outstanding equity interests	3,800
Allowance for doubtful accounts	2,200	$ 2,600
Net asset value	$ 13,700

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Amount classified as accumulated amortization attributable to disposal group held for sale or disposed of.

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Amount classified as accumulated depreciation attributable to disposal group held for sale or disposed of.

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Amount classified as allowance for doubtful accounts attributable to disposal group held for sale or disposed of.

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Amount of net assets (liabilities).

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The cash inflow associated with the deconsolidation of a previously consolidated subsidiary or the sale of investment in consolidated subsidiaries (generally greater than 50 percent).

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