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Other Operating (Losses) Gains, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2016
Other Operating (Losses) Gains, Net [Abstract]
Corporate -losses related to Straight Path Communications Inc.	$ (1,655)	$ (10,436)
Corporate-(losses) gain related to other legal matters	(628)	24
net2phone-UCaaS-other	(115)
Telecom & Payment Services- loss on disposal of property, plant and equipment			(326)
All Other-gain on sale of interest in Fabrix Systems, Ltd			1,086
TOTAL	$ (2,398)	$ (10,412)	$ 760

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- Definition

Corporate loss related to settlement.

+ References

No definition available.

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It represents about loss contingency loss in period including legal fees other general expense.

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- Definition

Amount of gain (loss) on sale or disposal of other assets.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

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Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
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Amount of gain (loss) on sale or disposal of equity in securities of subsidiaries.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
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Amount of general expenses not normally included in Other Operating Costs and Expenses.

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