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Other Operating Expense, Net (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Other Operating Expense, Net (Textual)
Accrual for non-income related taxes		$ 8,000		$ 8,000
Straight Path [Member]
Other Operating Expense, Net (Textual)
Recorded insurance proceeds	$ 1,400		$ 2,200
Legal fees	$ 1,200	$ 100	$ 2,500	$ 600

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Carrying value as of the balance sheet date of obligations incurred and payable for real and property taxes.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 720
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6419918&loc=d3e35281-107843

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.15(5))
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The amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings.

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-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
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Amount of insurance proceeds for an event or transaction that is unusual in nature or infrequent in occurrence, or both.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 20
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