Segment Reporting (Narrative) (Details)	3 Months Ended		6 Months Ended
	Jan. 31, 2015 customer	Jan. 31, 2014 customer	Jan. 31, 2015 customer segment	Jan. 31, 2014 customer
Segment Reporting [Abstract]
Number of reportable segments			2
Number of customers accounting for over 10% of net sales	0	0	0	0
Number of customers accounting for over 10% of gross accounts receivable	0	0	0	0