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Net Income (Loss) per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended			6 Months Ended
	Jul. 31, 2014	Oct. 31, 2013	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income (loss)	$ 5,203	$ 3,408	$ 6,210	$ 1,348	$ 1,763
Average shares outstanding	14,725		14,570	14,687	14,506
Net effect of dilutive stock options based on the treasury stock method using average market price	149		77	152	85
Totals	14,874		14,647	14,839	14,591
Earnings Per Share, Basic	$ 0.35		$ 0.43	$ 0.09	$ 0.12
Earnings Per Share, Diluted	$ 0.35		$ 0.42	$ 0.09	$ 0.12

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