OTHER CURRENT AND NON-CURRENT ASSETS (Details 3) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	$ 5,303	$ 18,469
Less than 12 months, Gross Unrealized Holding Losses	(7)	(816)
12 months or greater, Fair Value	0	0
12 months or greater, Gross Unrealized Holding Losses	0	0
Total, Fair Value	5,303	18,469
Total, Gross Unrealized Holding Losses	(7)	(816)
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	3,384	10,990
Less than 12 months, Gross Unrealized Holding Losses	(3)	(427)
12 months or greater, Fair Value	0	0
12 months or greater, Gross Unrealized Holding Losses	0	0
Total, Fair Value	3,384	10,990
Total, Gross Unrealized Holding Losses	(3)	(427)
Mortgage Backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	1,919
Less than 12 months, Gross Unrealized Holding Losses	(4)
12 months or greater, Fair Value	0
12 months or greater, Gross Unrealized Holding Losses	0
Total, Fair Value	1,919
Total, Gross Unrealized Holding Losses	(4)
U.S. Treasury [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value		3,778
Less than 12 months, Gross Unrealized Holding Losses		(90)
12 months or greater, Fair Value		0
12 months or greater, Gross Unrealized Holding Losses		0
Total, Fair Value		3,778
Total, Gross Unrealized Holding Losses		(90)
Federal Agency [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value		3,701
Less than 12 months, Gross Unrealized Holding Losses		(299)
12 months or greater, Fair Value		0
12 months or greater, Gross Unrealized Holding Losses		0
Total, Fair Value		3,701
Total, Gross Unrealized Holding Losses		$ (299)