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STOCKHOLDERS' EQUITY (Tables)

12 Months Ended

Jan. 31, 2014

Equity [Abstract]

Schedule of restricted stock

		Awards Outstanding				Weighted Average Grant Date Fair Value
Unvested as of January 31, 2012			925,900			$	22.60
Granted			358,985			$	35.18
Vested			(226,341	)		$	12.54
Canceled			(1,813	)		$	29.28
Unvested as of January 31, 2013			1,056,731			$	29.01
Granted			315,750			$	51.96
Vested			(236,316	)		$	22.04
Canceled			(15,988	)		$	29.01
Unvested as of January 31, 2014			1,120,177			$	36.95

Schedule of information regarding stock options

		2014								2013								2012
						Weighted								Weighted								Weighted
						Average								Average								Average
						Exercise								Exercise								Exercise
		Shares				Price				Shares				Price				Shares				Price
Stock options outstanding at beginning of year			382,054			$	20.79				417,722			$	16.59				514,190			$	14.54
Exercised			(109,766	)		$	17.36				(120,518	)		$	11.82				(60,668	)		$	10.21
Granted			-			$	-				85,000			$	28.72				40,000			$	27.13
Cancelled or forfeited			(3,800	)		$	19.39				(150	)		$	18.40				(75,800	)		$	13.35
Stock options outstanding at end of year			268,488			$	22.21				382,054			$	20.79				417,722			$	16.59
Exercisable			159,238			$	18.65				224,121			$	16.89				245,556			$	14.18

Schedule of information about stock options outstanding

		Number Outstanding as of				Weighted Average				Weighted Average				Number Exercisable as of				Weighted Average
		January 31,				Remaining				Exercise				January 31,				Exercise
Range of Exercise Prices		2014				Contractual Life				Price				2014				Price
$   3.00 - $   8.00			3,000				1.36			$	5.03				3,000			$	5.03
$   8.01 - $ 12.00			12,000				4.46			$	10.23				9,000			$	9.94
$ 12.01 - $ 16.00			56,100				3.92			$	13.63				56,100			$	13.63
$ 16.01 - $ 40.00			197,388				6.41			$	25.64				91,138			$	23.06
			268,488												159,238

Schedule of weighted average assumptions used in black-scholes option pricing model

		2013				2012
Expected stock price volatility			58.2% - 68.5%				68.5%
Expected lives of options
Directors and officers			7 years				7 years
Employees			6 years				6 years
Risk-free interest rate			0.3% - 0.6%				1.2%
Expected dividend yield			0%				0%

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Tabular disclosure of the changes in outstanding nonvested restricted stock units.

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Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

+ References

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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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