INCOME TAXES (Details 5) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2013
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating Losses	$ 85,829
Tax Credits	15,200
Finite Lived [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating Losses	14,364
Tax Credits	4,471
2014 [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating Losses	1,033
Tax Credits	11
2015-2023 [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating Losses	2,577
Tax Credits	2,377
2024-2033 [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating Losses	10,754
Tax Credits	2,083
Indefinite [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating Losses	71,465
Tax Credits	$ 10,729