FAIR VALUE (Details) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2012
Assets:
Total financial assets	$ 27,292
Liabilities:
Warrant liability	363
Total financial liabilities	363
Money Market Funds [Member]
Assets:
Total financial assets	27,048
Bank Time Deposits [Member]
Assets:
Total financial assets	244
Fair Value, Inputs, Level 1 [Member]
Assets:
Total financial assets	27,292
Liabilities:
Warrant liability	0
Total financial liabilities	0
Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]
Assets:
Total financial assets	27,048
Fair Value, Inputs, Level 1 [Member] | Bank Time Deposits [Member]
Assets:
Total financial assets	244
Fair Value, Inputs, Level 2 [Member]
Assets:
Total financial assets	0
Liabilities:
Warrant liability	0
Total financial liabilities	0
Fair Value, Inputs, Level 2 [Member] | Money Market Funds [Member]
Assets:
Total financial assets	0
Fair Value, Inputs, Level 2 [Member] | Bank Time Deposits [Member]
Assets:
Total financial assets	0
Fair Value, Inputs, Level 3 [Member]
Assets:
Total financial assets	0
Liabilities:
Warrant liability	363
Total financial liabilities	363
Fair Value, Inputs, Level 3 [Member] | Money Market Funds [Member]
Assets:
Total financial assets	0
Fair Value, Inputs, Level 3 [Member] | Bank Time Deposits [Member]
Assets:
Total financial assets	$ 0