Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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Share Based Compensation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011
Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	$ 208	$ 244	$ 688	$ 768
All Option and Restricted Stock Unit Plans [Member]
Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	194	231	651	727
All Option and Restricted Stock Unit Plans [Member] \| Minimum [Member]
Share-based Payment Award [Line Items]
Fair Value Assumptions, Expected Volatility Rate			45.00%	46.00%
Fair Value Assumptions, Expected Term			4 years 3 months	3 years 7 months
Fair Value Assumptions, Risk Free Interest Rate			0.65%	1.36%
Fair Value Assumptions, Expected Dividend Rate			0.00%	0.00%
All Option and Restricted Stock Unit Plans [Member] \| Maximum [Member]
Share-based Payment Award [Line Items]
Fair Value Assumptions, Expected Volatility Rate			50.00%	53.00%
Fair Value Assumptions, Expected Term			5 years 9 months	5 years 6 months
Fair Value Assumptions, Risk Free Interest Rate			1.03%	1.95%
Fair Value Assumptions, Expected Dividend Rate			0.00%	0.00%
2005 Employee Stock Purchase Plan [Member]
Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	$ 14	$ 13	$ 37	$ 41
2005 Employee Stock Purchase Plan [Member] \| Minimum [Member]
Share-based Payment Award [Line Items]
Fair Value Assumptions, Expected Volatility Rate			31.00%	23.00%
Fair Value Assumptions, Expected Term			0 years 6 months	0 years 6 months
Fair Value Assumptions, Risk Free Interest Rate			0.06%	0.10%
Fair Value Assumptions, Expected Dividend Rate			0.00%	0.00%
2005 Employee Stock Purchase Plan [Member] \| Maximum [Member]
Share-based Payment Award [Line Items]
Fair Value Assumptions, Expected Volatility Rate			37.00%	31.00%
Fair Value Assumptions, Expected Term			1 year	1 year
Fair Value Assumptions, Risk Free Interest Rate			0.21%	0.28%
Fair Value Assumptions, Expected Dividend Rate			0.00%	0.00%