OTHER FINANCIAL INFORMATION (Schedule of Interest Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2021	Aug. 31, 2020
Condensed Income Statements, Captions [Line Items]
Amortization of discount and issue costs			$ 5,191	$ 5,219
Other interest expense	$ 143	$ 378	299	599
Total interest expense	3,804	3,857	7,653	7,934
2025 Convertible Notes [Member]
Condensed Income Statements, Captions [Line Items]
Stated interest	1,150	1,150	2,326	2,313
Amortization of discount and issue costs	2,511	2,329	5,028	4,640
Interest expense on convertible notes	$ 3,661	$ 3,479	$ 7,354	6,953
2020 Convertible Notes [Member]
Condensed Income Statements, Captions [Line Items]
Stated interest				93
Amortization of discount and issue costs				289
Interest expense on convertible notes				$ 382