Stock Option Activity (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Apr. 30, 2014	Apr. 30, 2013
Number of Shares
Options, Outstanding Beginning of Period	236,134	362,085	236,134	362,085
Granted	0	0
Exercised	(86,468)	(18,167)
Canceled	(12,333)	(75,149)
Options, Outstanding End of Period	137,333	268,769
Options, Exercisable, End of Period	127,666	207,771
Weighted-Average Exercise Price
Options, Outstanding, Beginning of Period, Weighted Average Exercise Price Per Share	$ 9.93	$ 9.99	$ 9.93	$ 9.99
Granted, Weighted Average Exercise Price Per Share	$ 0.00	$ 0.00
Exercised, Weighted Average Exercise Price Per Share	$ 9.92	$ 5.90
Canceled, Weighted Average Exercise Price Per Share	$ 7.19	$ 12.47
Options, Outstanding, End of Period, Weighted Average Exercise Price Per Share	$ 9.73	$ 9.57
Options, Exercisable, Weighted Average Exercise Price Per Share	$ 9.86	$ 9.44
Options Outstanding, Weighted Average Remaining Contractual Term			5 years 9 months 5 days	6 years 6 months 10 days
Options Outstanding, Intrinsic Value	$ 1,374	$ 486
Options Exercisable, Weighted Average Remaining Contractual Term			5 years 7 months 8 days	6 years 0 months 17 days
Options Exercisable, Intrinsic Value	$ 1,262	$ 432