OTHER FINANCIAL INFORMATION (Schedule of Interest Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	May 31, 2017	May 31, 2016
Interest expense on convertible senior unsecured notes:
Stated interest at 1.625% per annum	$ 701	$ 701
Amortization of note discount	1,610	1,507
Amortization of debt issue costs	206	192
Interest expense on convertible notes	2,517	2,400
Other interest expense	1	24
Total interest expense	$ 2,518	$ 2,424
Convertible Senior Notes [Member]
Condensed Income Statements, Captions [Line Items]
Interest rate (as a percent)	1.65%	1.65%