INCOME TAXES (Details Textuals) (USD $)	3 Months Ended
	Jul. 31, 2011	Jan. 31, 2011	Oct. 31, 2010
Tax Credit Carryforward [Line Items]
Unrecognized tax benefits on uncertain tax position	$ 2,261,000		$ 2,306,000
Unrecognized tax benefits that would impact effective tax rate	1,822,000
Aggregate net income impact from tax related items	2,000,000
Net income impact from amended state tax returns	900,000
Net income impact from research and development tax credits	900,000	800,000
Net income impact from prior year tax return to accrual adjustments	$ 200,000