STOCKHOLDERS' EQUITY (Tables)

12 Months Ended

Feb. 29, 2016

STOCKHOLDERS' EQUITY [Abstract]

Summary of Stock Option Activity

			Weighted
	Number of		Average
	Options		Exercise Price
Outstanding at February 28, 2013	1,656		$	5.53
Granted	56			15.14
Exercised	(611	)		7.28
Forfeited or expired	(8	)		4.53
Outstanding at February 28, 2014	1,093			5.04
Granted	61			17.47
Exercised	(143	)		5.01
Forfeited or expired	(4	)		6.88
Outstanding at February 28, 2015	1,007			5.80
Granted	82			17.54
Exercised	(228	)		5.62
Forfeited or expired	(1	)		1.80
Outstanding at February 28, 2016	860		$	6.96
Exercisable at February 28, 2016	688		$	4.66

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

	Year Ended February 28,
Black-Scholes Valuation Assumptions	2016		2015		2014
Expected life (years) (1)	6		6		6
Expected volatility (2)	56	%	70	%	69	%
Risk-free interest rates (3)	1.8	%	1.9	%	1.7	%
Expected dividend yield	0	%	0	%	0	%

(1)	The expected life of stock options is estimated based on historical experience.
(2)	The expected volatility is estimated based on historical volatility of the Company's stock price.
(3)	Based on the U.S. Treasury constant maturity interest rate whose term is consistent with the expected life of the stock options.

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

	Number of
	Restricted		Weighted
	Shares,		Average Grant
	PSUs and		Date Fair
	RSUs		Value
Outstanding at February 28, 2013	1,338		$	4.40
Granted	312			15.58
Vested	(592	)		3.83
Forfeited	(34	)		7.88
Outstanding at February 28, 2014	1,024			8.02
Granted	365			17.92
Vested	(471	)		6.28
Forfeited	(32	)		11.69
Outstanding at February 28, 2015	886			12.90
Granted	517			17.75
Vested	(407	)		9.97
Forfeited	(43	)		15.55
Outstanding at February 28, 2016	953		$	16.66

Schedule of Stock-based Compensation Expense

	Year Ended February 28,
	2016		2015		2014
Cost of revenues	$	229	$	241	$	191
Research and development		781		613		516
Selling		1,208		591		360
General and administrative		3,636		2,655		1,857
	$	5,854	$	4,100	$	2,924