Summary of Significant Accounting Policies Accounts Receivables (Details) - USD ($) $ in Thousands	12 Months Ended
Jul. 31, 2019	Jul. 31, 2018
Receivables [Abstract]
Accounts Receivable, Allowance for Credit Loss, Current	$ 5,005	$ 4,471
Entity-Wide Revenue, Major Customer, Percentage	10.00%
Percentage Of Maximum Customers Shares In Companys Consolidated Accounts Receivable	10.00%

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://fasb.org/us-gaap/role/ref/legacyRef
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