QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Oct. 31, 2012	Jul. 31, 2012	Apr. 30, 2012	Jan. 31, 2012	Oct. 31, 2011	Jul. 31, 2011	Apr. 30, 2011	Jan. 31, 2011	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010
Net revenues	$ 26,562	$ 9,145	$ 30,400	$ 66,180	$ 25,138	$ 19,545	$ 32,142	$ 48,466	$ 132,287	$ 125,291	$ 75,648
Gross profit	4,814	3,516	12,171	23,014	4,240	7,953	13,651	19,631	43,515	45,475	18,385
Operating income (loss)	(2,988)	(3,613)	2,758	7,555	(2,951)	938	5,334	8,039	3,712	11,360	(2,111)
Net income (loss)	$ (2,729)	$ (3,087)	$ 2,703	$ 7,726	$ (3,894)	$ 1,889	$ 2,075	$ 6,762	$ 4,613	$ 6,832	$ (972)
Net income (loss) per share:
Basic (in dollars per share)	$ (0.07)	$ (0.08)	$ 0.07	$ 0.19	$ (0.10)	$ 0.05	$ 0.05	$ 0.18	$ 0.12	$ 0.18	$ (0.03)
Diluted (in dollars per share)	$ (0.07)	$ (0.08)	$ 0.07	$ 0.19	$ (0.10)	$ 0.05	$ 0.05	$ 0.18	$ 0.11	$ 0.17	$ (0.03)