STOCK-BASED COMPENSATION (Schedule of Stock-based Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2015	Aug. 31, 2014	Aug. 31, 2015	Aug. 31, 2014
Stock-based compensation expense	$ 1,389	$ 936	$ 2,609	$ 1,756
Cost of revenues [Member]
Stock-based compensation expense	54	58	119	110
Research and development [Member]
Stock-based compensation expense	198	148	362	283
Selling [Member]
Stock-based compensation expense	295	126	495	239
General and administrative [Member]
Stock-based compensation expense	$ 842	$ 604	$ 1,633	$ 1,124