RESTRUCTURING CHARGES - Summary of Activity Resulting from Implementation of Restructuring Plan within Other Current and Non-current Liabilities (Details) - USD ($)	3 Months Ended		15 Months Ended
	May 31, 2019	May 31, 2018	May 31, 2019
Restructuring Cost And Reserve [Line Items]
Restructuring liabilities as of February 28, 2019	$ 5,756,000
Cease-use liability reclassifed as reduction of Operating lease right-of-use assets	(2,977,000)
Charges	0	$ 3,383,000	$ 8,000,000
Payments	(1,139,000)
Restructuring liabilities as of May 31, 2019	1,640,000		1,640,000
Personnel [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring liabilities as of February 28, 2019	2,779,000
Payments	(1,139,000)
Restructuring liabilities as of May 31, 2019	1,640,000		$ 1,640,000
Facilities [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring liabilities as of February 28, 2019	2,977,000
Cease-use liability reclassifed as reduction of Operating lease right-of-use assets	$ (2,977,000)