OTHER FINANCIAL INFORMATION (Schedule of Interest Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2019
Condensed Income Statements, Captions [Line Items]
Amortization of discount and issuance costs	$ 10,180	$ 13,764	$ 11,492
Other interest expense	1,140	933	143
Total interest expense	15,487	20,096	16,726
2020 Convertible Notes [Member]
Condensed Income Statements, Captions [Line Items]
Stated interest	93	1,464	2,308
Amortization of discount and issuance costs	289	4,336	6,484
Interest expense on convertible notes	382	5,800	8,792
2025 Convertible Notes [Member]
Condensed Income Statements, Captions [Line Items]
Stated interest	4,587	4,613	2,811
Amortization of discount and issuance costs	9,378	8,750	4,980
Interest expense on convertible notes	$ 13,965	$ 13,363	$ 7,791