OTHER CURRENT AND NON-CURRENT ASSETS (Details 3) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2013	Jul. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	$ 18,469	$ 616
Less than 12 months, Gross Unrealized Holding Losses	(816)	(7)
12 months or greater, Fair Value	0	1,966
12 months or greater, Gross Unrealized Holding Losses	0	(35)
Total, Fair Value	18,469	2,582
Total, Gross Unrealized Holding Losses	(816)	(42)
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	10,990	0
Less than 12 months, Gross Unrealized Holding Losses	(427)	0
12 months or greater, Fair Value	0	462
12 months or greater, Gross Unrealized Holding Losses	0	(8)
Total, Fair Value	10,990	462
Total, Gross Unrealized Holding Losses	(427)	(8)
Collateralized Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value		0
Less than 12 months, Gross Unrealized Holding Losses		0
12 months or greater, Fair Value		1,504
12 months or greater, Gross Unrealized Holding Losses		(27)
Total, Fair Value		1,504
Total, Gross Unrealized Holding Losses		(27)
U.S. Treasury [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	3,778	589
Less than 12 months, Gross Unrealized Holding Losses	(90)	(1)
12 months or greater, Fair Value	0	0
12 months or greater, Gross Unrealized Holding Losses	0	0
Total, Fair Value	3,778	589
Total, Gross Unrealized Holding Losses	(90)	(1)
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)
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value		27
Less than 12 months, Gross Unrealized Holding Losses		(6)
12 months or greater, Fair Value		0
12 months or greater, Gross Unrealized Holding Losses		0
Total, Fair Value		27
Total, Gross Unrealized Holding Losses		$ (6)