QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Feb. 28, 2014	Nov. 30, 2013	Aug. 31, 2013	May 31, 2013	Feb. 28, 2013	Nov. 30, 2012	Aug. 31, 2012	May 31, 2012	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2012
QUARTERLY FINANCIAL INFORMATION (UNAUDITED) [Abstract]
Revenues	$ 59,847	$ 63,503	$ 58,807	$ 53,746	$ 48,391	$ 44,340	$ 43,987	$ 43,861	$ 235,903	$ 180,579	$ 138,728
Gross profit	20,616	20,995	19,839	18,481	15,050	14,032	14,135	13,676	79,931	56,893	42,019
Gross margin	34.40%	33.10%	33.70%	34.40%	31.10%	31.60%	32.10%	31.20%	33.90%	31.50%	30.30%
Net income	$ 3,067	$ 4,207	$ 2,844	$ 1,685	$ 32,630	$ 4,155	$ 3,659	$ 4,182	$ 11,803	$ 44,626	$ 5,218
Earnings per diluted share	$ 0.08	$ 0.12	$ 0.08	$ 0.05	$ 1.06	$ 0.14	$ 0.12	$ 0.14	$ 0.33	$ 1.49	$ 0.18