INCOME TAXES (Details 5) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2014
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating Losses	$ 108,772
Tax Credits	16,347
Finite Lived [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating Losses	4,521
Tax Credits	3,869
2015 [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating Losses	543
Tax Credits	17
2016-2024 [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating Losses	1,739
Tax Credits	2,287
2025-2034 [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating Losses	2,239
Tax Credits	1,565
Indefinite [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating Losses	104,251
Tax Credits	$ 12,478