OTHER FINANCIAL INFORMATION (Schedule of Interest Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	May 31, 2020	May 31, 2019
Condensed Income Statements, Captions [Line Items]
Amortization of discount and issue costs	$ 2,753	$ 3,743
Other interest expense	221	158
Total interest expense	4,077	5,456
2020 Convertible Notes [Member]
Condensed Income Statements, Captions [Line Items]
Stated interest	93	498
Amortization of discount and issue costs	289	1,456
Interest expense on convertible notes	382	1,954
2025 Convertible Notes [Member]
Condensed Income Statements, Captions [Line Items]
Stated interest	1,163	1,176
Amortization of discount and issue costs	2,311	2,168
Interest expense on convertible notes	$ 3,474	$ 3,344