EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Feb. 29, 2016	Nov. 30, 2015	Aug. 31, 2015	May. 31, 2015	Feb. 28, 2015	Nov. 30, 2014	Aug. 31, 2014	May. 31, 2014	Feb. 29, 2016	Feb. 28, 2015	Feb. 28, 2014
EARNINGS PER SHARE [Abstract]
Net income	$ 5,506	$ 3,876	$ 3,499	$ 4,059	$ 6,516	$ 4,021	$ 3,278	$ 2,693	$ 16,940	$ 16,508	$ 11,803
Basic weighted average number of common shares outstanding									36,448,000	35,784,000	34,969,000
Effect of stock options and restricted stock units computed on treasury stock method									502,000	746,000	1,054,000
Diluted weighted average number of common shares outstanding									36,950,000	36,530,000	36,023,000
Basic									$ 0.46	$ 0.46	$ 0.34
Diluted	$ 0.15	$ 0.10	$ 0.10	$ 0.11	$ 0.18	$ 0.11	$ 0.09	$ 0.07	$ 0.46	$ 0.45	$ 0.33
Shares subject to anti-dilutive stock options and restricted stock-based awards excluded from calculation									199,000	159,000	57,000
Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Conversion price (in dollars per share)	$ 27.594								$ 27.594