Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Apr. 30, 2014
Number of Shares
Options, Outstanding Beginning of Period	123,333	236,134
Granted	0	0
Exercised	(19,317)	(88,363)
Canceled	(11,350)	(12,333)
Options, Outstanding End of Period	92,666
Options, Exercisable, End of Period	92,666
Weighted-Average Exercise Price
Options, Outstanding, Beginning of Period, Weighted Average Exercise Price Per Share	$ 9.77	$ 9.93
Granted, Weighted Average Exercise Price Per Share	0.00	0.00
Exercised, Weighted Average Exercise Price Per Share	8.19	9.83
Canceled, Weighted Average Exercise Price Per Share	11.58	$ 7.19
Options, Exercisable, Weighted Average Exercise Price Per Share	9.77		$ 9.93
Options, Outstanding, End of Period, Weighted Average Exercise Price Per Share	$ 9.77
Options Outstanding, Weighted Average Remaining Contractual Term	4 years 6 months 4 days	5 years 6 months 5 days
Options Outstanding, Intrinsic Value	$ 244		$ 976
Options Exercisable, Weighted Average Remaining Contractual Term	4 years 6 months 4 days	5 years 4 months 15 days
Options Exercisable, Intrinsic Value	$ 244		$ 890