EARNINGS (LOSS) PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Feb. 28, 2018	Nov. 30, 2017	Aug. 31, 2017	May 31, 2017	Feb. 28, 2017	Nov. 30, 2016	Aug. 31, 2016	May 31, 2016	Feb. 28, 2018	Feb. 28, 2017	Feb. 29, 2016
Earnings Per Share [Abstract]
Net income (loss)	$ (4,767)	$ 11,806	$ 12,232	$ (2,654)	$ (4,239)	$ (1,527)	$ 521	$ (2,659)	$ 16,617	$ (7,904)	$ 16,940
Basic weighted average number of common shares outstanding									35,250	35,917	36,448
Effect of stock options and restricted stock units computed on treasury stock method									889		502
Diluted weighted average number of common shares outstanding									36,139	35,917	36,950
Earnings (loss) per share:
Basic									$ 0.47	$ (0.22)	$ 0.46
Diluted	$ (0.13)	$ 0.33	$ 0.34	$ (0.08)	$ (0.12)	$ (0.04)	$ 0.01	$ (0.07)	$ 0.46	$ (0.22)	$ 0.46