INCOME TAXES (Details 5) (USD $) In Thousands	Jul. 31, 2011
Operating losses	$ 92,742
Expiration Period Current [Member]
Operating losses	0
Expiration Period Two To Ten Years [Member]
Operating losses	3,709
Expiration Period Eleven To Twenty Years [Member]
Operating losses	0
Subtotal [Member]
Operating losses	3,709
Expiration Period Indefinite [Member]
Operating losses	$ 89,033