Net Income (Loss) per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2012		Oct. 31, 2011
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
The number of stock options outstanding		33,000			55,000
Net Income (Loss) per Share
Net income (loss)	$ 2,908	$ (3,299)	$ 5,128		$ (5,967)
Average shares outstanding	14,441,000	14,285,000	14,369,000		14,241,000
Net effect of dilutive stock options based on the treasury stock method using average market price	188,000	0	105,000		0
Totals	14,629,000	14,285,000	14,474,000		14,241,000
Net income (loss) per share - basic	$ 0.20	$ (0.23)	$ 0.36	[1]	$ (0.42)	[1]
Net income (loss) per share - diluted	$ 0.20	$ (0.23)	$ 0.35	[1]	$ (0.42)	[1]

[1] Net income per common share for the nine months ended October 31, 2012 was calculated based on the basic and diluted shares outstanding. Net loss per common share for the nine months ended October 31, 2011 was calculated only based on basic shares outstanding due to the anti-dilutive effect on the inclusion of common stock equivalent shares.