Benefit Plans (Tables)

12 Months Ended

Oct. 31, 2013

Note 9. Share-Based Compensation Plans [Abstract]

Schedule of Assumptions Used [Table Text Block]

The fair value of stock options is estimated on the grant date using the Black-Scholes option valuation model and the following weighted-average assumptions:

	2013		2012		2011
Expected life (in years)	7.0		7.0		7.0
Risk free interest rate	1.2	%	1.6	%	3.0	%
Volatility	76.5	%	75.5	%	73.0	%
Dividends yield	—	%	—	%	—	%

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]

Share-based compensation was reflected in the consolidated statements of operations as follows:

	2013		2012		2011
Cost of revenues	$	584	$	587	$	841
General and administrative expense	1,325		1,182		1,275
Research and development expense	308		280		457
Total share-based compensation	$	2,217	$	2,049	$	2,573

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

The following table summarizes our stock option activity for the year ended October 31, 2013:

			Weighted- Average Option
Options	Shares		Price
Outstanding at October 31, 2012	3,120,456		$	6.96
Granted	279,746		$	0.94
Cancelled	(218,738	)	$	7.05
Outstanding at October 31, 2013	3,181,464		$	6.42

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

The following table summarizes information about stock options outstanding and exercisable at October 31, 2013:

	Options Outstanding				Options Exercisable
		Weighted Average	Weighted Average			Weighted Average
Range of	Number	Remaining	Exercise		Number	Exercise
Exercise Prices	outstanding	Contractual Life	Price		exercisable	Price
$0.26 — $5.10	1,221,787	7.7	$	1.83	1,081,913	$	1.95
$5.11 — $9.92	1,274,779	3.4	$	8.09	1,274,779	$	8.09
$9.93 — $14.74	675,398	1.8	$	11.46	675,398	$	11.46
$14.75 — $19.56	9,500	0.1	$	16.30	9,500	$	16.30
	3,181,464	4.7	$	6.43	3,041,590	$	6.68