FAIR VALUE (Details 1) (USD $)	12 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010
Expected warrant term	4 years 3 months	4 years 3 months	4 years 3 months
Risk-free rate	0.50%	1.50%	1.30%
Expected volatility	86.00%	76.00%	74.00%
Dividend yield	0.00%	0.00%	0.00%
Maximum [Member]
Estimated fair value of stock	3.37	3.75	1.02
Expected warrant term	1 year 4 months 24 days	2 years 4 months 24 days	3 years 4 months 24 days
Risk-free rate	0.20%	0.80%	1.60%
Expected volatility	80.00%	79.70%	76.10%
Minimum [Member]
Estimated fair value of stock	1.00	0.62	0.62
Expected warrant term	0 years 4 months 24 days	1 year 4 months 24 days	2 years 4 months 24 days
Risk-free rate	0.10%	0.20%	0.40%
Expected volatility	77.40%	73.50%	73.50%