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Net Income (Loss) per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012
Net Income (Loss) per Share
Net income (loss)	$ 3,408	$ 2,908	$ 5,171	$ 5,128
Average shares outstanding	14,647	14,441	14,582	14,369
Net effect of dilutive stock options based on the treasury stock method using average market price	143	188	130	105
Totals	14,790	14,629	14,712	14,474
Net income (loss) per share - basic	$ 0.23	$ 0.20	$ 0.35	$ 0.36
Net income (loss) per share - diluted	$ 0.23	$ 0.20	$ 0.35	$ 0.35

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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