OTHER FINANCIAL INFORMATION (Schedule of Interest Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 29, 2020	Feb. 28, 2019	Feb. 28, 2018
Condensed Income Statements, Captions [Line Items]
Amortization of discount and issuance costs	$ 13,764	$ 11,492	$ 7,472
Other interest expense	933	143	2
Total interest expense	20,096	16,726	10,280
2020 Convertible Notes [Member]
Condensed Income Statements, Captions [Line Items]
Stated interest	1,464	2,308	2,806
Amortization of discount and issuance costs	4,336	6,484	7,472
Interest expense on convertible notes	5,800	8,792	$ 10,278
2025 Convertible Notes [Member]
Condensed Income Statements, Captions [Line Items]
Stated interest	4,613	2,811
Amortization of discount and issuance costs	8,750	4,980
Interest expense on convertible notes	$ 13,363	$ 7,791