Summary of Significant Accounting Policies Accounts Receivables (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Jul. 31, 2017 |
Jul. 31, 2016 |
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| Receivables [Abstract] | ||
| Allowance for Doubtful Accounts Receivable, Current | $ 4,629 | $ 5,144 |
| Entity-Wide Revenue, Major Customer, Percentage | 10.00% | |
| Percentage Of Maximum Customers Shares In Companys Consolidated Accounts Receivable | 10.00% |
| X | ||||||||||
- Definition Percentage of maximum customers shares in company's consolidated accounts receivable. No definition available.
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| X | ||||||||||
- Definition A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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