Stock-Based Compensation (Tables)

12 Months Ended

Jan. 31, 2013

Stock- Based Compensation [Abstract]

Summary of activity under Option and Stock Plans

	Shares			Weighted Average Exercise Price		Weighted Average Remaining Term (years)		Weighted Average Fair Value
Outstanding, January 31, 2011		675,724		$	11.29		5.78	$	5.79
Granted		212,500		$	13.92
Exercised		(55,038	)	$	9.36
Forfeited		(16,000	)	$	11.36
Outstanding, January 31, 2012		817,186		$	12.10		4.94	$	5.68
Granted		293,000		$	17.36
Exercised		(153,962	)	$	9.33
Forfeited		(30,000	)	$	8.66
Outstanding, January 31, 2013		926,224		$	14.34		5.39	$	5.93
Exercisable, January 31, 2013		633,224		$	12.94		4.37	$	6.06

Summary of change in number of non-vested options to purchase shares of common stock

	Shares			Weighted Average Fair Value
Non-vested, January 31, 2011		237,000		$	6.31
Granted		212,500		$	5.09
Vested		(232,000	)	$	6.34
Forfeited		(5,000	)	$	4.98
Non-vested, January 31, 2012		212,500		$	5.09
Granted		293,000		$	5.65
Vested		(207,500	)	$	5.06
Forfeited		(5,000	)	$	6.32
Non-vested, January 31, 2013		293,000		$	5.65

Summary of assumptions used to estimate fair value of stock options granted

	2013	2012
Risk-free interest rate	1.93%	2.57%
Expected volatility	35.51%	44.88%
Expected life	4.56 years	4.26 years
Dividend yield	—%	—%