FAIR VALUE (Details 1) (USD $)	3 Months Ended		9 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011
Dividend yield	0.00%	0.00%	0.00%	0.00%
Maximum [Member]
Estimated fair value of stock	2.45	3.75	3.37	3.75
Expected warrant term	10 months 24 days	1 year 10 months 24 days	1 year 4 months 24 days	2 years 4 months 24 days
Risk-free rate	0.20%	0.60%	0.20%	0.80%
Expected volatility	79.00%	77.90%	80.10%	77.90%
Minimum [Member]
Estimated fair value of stock	1.77	2.45	1.77	0.62
Expected warrant term	7 months 6 days	1 year 7 months 6 days	7 months 6 days	7 months 6 days
Risk-free rate	0.10%	0.30%	0.10%	0.30%
Expected volatility	77.90%	77.90%	77.90%	73.50%