OPERATING SEGMENTS Largest Customer (Details)	12 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2010
Revenue, Major Customer
Net Sales for the years ended July 31	22.00%	21.00%	20.00%
Net Accounts Receivable as of July 31	32.00%	33.00%	32.00%