OTHER FINANCIAL INFORMATION (Schedule of Interest Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2019	Nov. 30, 2018
Condensed Income Statements, Captions [Line Items]
Amortization of discount and debt issuance costs			$ 11,031	$ 7,999
Other interest expense	$ 240	$ 30	650	116
Total interest expense	4,987	5,134	15,998	11,566
2020 Convertible Notes [Member]
Condensed Income Statements, Captions [Line Items]
Stated interest	356	498	1,352	1,810
Amortization of discount and debt issuance costs	1,038	1,412	3,989	5,034
Interest expense on convertible notes	1,394	1,910	5,341	6,844
2025 Convertible Notes [Member]
Condensed Income Statements, Captions [Line Items]
Stated interest	1,150	1,150	3,476	1,661
Amortization of discount and debt issuance costs	2,203	2,044	6,531	2,945
Interest expense on convertible notes	$ 3,353	$ 3,194	$ 10,007	$ 4,606