STOCKHOLDERS' EQUITY (Tables)

12 Months Ended

Feb. 28, 2018

The following table summarizes our stock option activity (number of options and aggregate intrinsic value in thousands):

	Number of Options			Weighted Average Exercise Price		Weighted average remaining contractual life (years)		Aggregate intrinsic value
Outstanding at February 28, 2015		1,007		$	5.80		4.6
Granted		82			17.54
Exercised		(228	)		5.62
Forfeited or expired		(1	)		1.80
Outstanding at February 28, 2016		860			6.96		4.7
Granted		227			14.49
Exercised		(125	)		7.67
Forfeited or expired		(7	)		15.70
Outstanding at February 28, 2017		955		$	8.60		5.5
Granted		165			19.31
Exercised		(140	)		2.36
Forfeited or expired		-			-
Outstanding at February 28, 2018		980		$	11.29		5.9	$	11,866
Exercisable at February 28, 2016		688		$	4.66		4.7	$	9,374
Exercisable at February 28, 2017		624		$	5.03		5.5	$	7,046
Exercisable at February 28, 2018		590		$	7.54		4.1	$	9,349

Year ended February 28,

2018

2017

2016

Weighted average grant date fair value of stock

options granted during the year

10.20

6.69

9.39

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

We use the Black-Scholes-Merton option pricing model for valuation of stock option awards. Calculating the fair value of stock option awards requires the input of highly complex and subjective assumptions. Other reasonable assumptions could provide differing results. The fair value of stock options at the grant date was determined using the following assumptions:

	Year Ended February 28,
Black-Scholes Valuation Assumptions	2018	2017	2016
Expected life (years)	6	6	6
Expected volatility	46%	48%	56%
Risk-free interest rates	2.0%	1.3%	1.8%
Expected dividend yield	0%	0%	0%

Summary of Restricted Stock Shares, Performance Stock Units (PSU's) and RSUs Activity

Changes in our outstanding restricted stock shares, PSUs and RSUs at February 28, 2018, 2017 and 2016 were as follows (shares in thousands):

	Number of Restricted Shares, PSUs and RSUs			Weighted Average Grant Date Fair Value		Shares Retained to Cover Statutory Minimum Withholding Taxes
Outstanding at February 28, 2015		886		$	12.90
Granted		517			17.75
Vested		(407	)		9.97		147
Forfeited		(43	)		15.55
Outstanding at February 28, 2016		953			16.66
Granted		766			14.63
Vested		(382	)		15.18		122
Forfeited		(98	)		15.64
Outstanding at February 28, 2017		1,239		$	15.94
Granted		770			19.55
Vested		(399	)		15.92		133
Forfeited		(176	)		17.34
Outstanding at February 28, 2018		1,434		$	17.72

Schedule of Stock-based Compensation Expense

Stock-based compensation expense is included in the following captions of the consolidated statements of comprehensive income (loss) (in thousands):

	Year Ended February 28,
	2018		2017		2016
Cost of revenues	$	653	$	374	$	229
Research and development		1,471		1,033		781
Selling and marketing		2,314		1,655		1,208
General and administrative		4,860		4,771		3,636
	$	9,298	$	7,833	$	5,854