Segment Reporting (Narrative) (Details)	12 Months Ended
	Jul. 31, 2016 customer segment	Jul. 31, 2015 customer	Jul. 31, 2014 customer
Segment Reporting, Measurement Disclosures [Abstract]
Number of Reportable Segments | segment	2
Number Of Customers Accounting For Over Ten Percent Of Net Sales	0	0	0
Number Of Customers Accounting For Over Ten Percent Of Gross Accounts Receivable	0	0