OTHER FINANCIAL INFORMATION (Schedule of Interest Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2020	Nov. 30, 2019
Condensed Income Statements, Captions [Line Items]
Amortization of discount and issue costs			$ 7,712	$ 11,031
Other interest expense	$ 356	$ 240	955	650
Total interest expense	3,880	4,987	11,814	15,998
2020 Convertible Notes [Member]
Condensed Income Statements, Captions [Line Items]
Stated interest		356	93	1,352
Amortization of discount and issue costs		1,038	289	3,989
Interest expense on convertible notes		1,394	382	5,341
2025 Convertible Notes [Member]
Condensed Income Statements, Captions [Line Items]
Stated interest	1,150	1,150	3,463	3,476
Amortization of discount and issue costs	2,374	2,203	7,014	6,531
Interest expense on convertible notes	$ 3,524	$ 3,353	$ 10,477	$ 10,007