QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Feb. 28, 2013	Nov. 30, 2012	Aug. 31, 2012	May 31, 2012	Feb. 29, 2012	Nov. 30, 2011	Aug. 31, 2011	May 31, 2011	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2011
QUARTERLY FINANCIAL INFORMATION (UNAUDITED) [Abstract]
Revenues	$ 48,391	$ 44,340	$ 43,987	$ 43,861	$ 37,621	$ 32,752	$ 33,801	$ 34,554	$ 180,579	$ 138,728	$ 114,333
Gross profit	15,050	14,032	14,135	13,676	10,593	10,169	11,825	9,432	56,893	42,019	29,558
Gross margin	31.10%	31.60%	32.10%	31.20%	28.20%	31.00%	35.00%	27.30%	31.50%	30.30%	25.90%
Net income (loss)	$ 32,630	$ 4,155	$ 3,659	$ 4,182	$ 1,642	$ 1,700	$ 1,356	$ 520	$ 44,626	$ 5,218	$ (3,283)
Earnings per diluted share	$ 1.06	$ 0.14	$ 0.12	$ 0.14	$ 0.06	$ 0.06	$ 0.05	$ 0.02	$ 1.49	$ 0.18	$ (0.12)