STOCK-BASED COMPENSATION (Schedule of Stock-based Compensation Expense) (Details) (USD $)	3 Months Ended		9 Months Ended
	Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2014	Nov. 30, 2013
Stock-based compensation expense	$ 1,168,000	$ 808,000	$ 2,924,000	$ 2,129,000
Cost of revenues [Member]
Stock-based compensation expense	65,000	52,000	176,000	133,000
Research and development [Member]
Stock-based compensation expense	171,000	148,000	452,000	380,000
Selling [Member]
Stock-based compensation expense	178,000	112,000	418,000	270,000
General and administrative [Member]
Stock-based compensation expense	$ 754,000	$ 496,000	$ 1,878,000	$ 1,346,000