INCOME TAXES (Narrative) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Feb. 29, 2020	Feb. 29, 2020	Feb. 28, 2019	Feb. 28, 2018
Operating Loss Carryforwards [Line Items]
Change in valuation allowance deferred tax asset	$ 34,600,000	$ 33,000,000
Gross excess tax deductions from share-based payment arrangements			$ 2,900,000	$ 2,600,000
Tax deficiency from share-based payment arrangements		2,400,000
Unrecognized tax benefit from uncertain tax position	2,200,000	2,200,000	3,200,000	1,000,000
Accrued interest and/or penalties	0	0
Deferred income taxes recognized		0
Income tax expense		20,454,000	(1,330,000)	$ 10,681,000
Minimum [Member]
Operating Loss Carryforwards [Line Items]
Income tax benefit attributable to reduction in unrecognized tax benefits		500,000
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Change in valuation allowance deferred tax asset		1,600,000
Net operating loss carryforwards	35,400,000	35,400,000
Unexpire operating loss carryforwards	18,500,000	18,500,000
Tax credit carryforwards	1,900,000	1,900,000
Unrecognized tax benefits, period increase (decrease)		(900,000)
Domestic Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	38,900,000	38,900,000
Unrecognized tax benefits, period increase (decrease)		(100,000)
Domestic Tax Authority [Member] | Research Tax Credit Carryforward [Member]
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	9,800,000	9,800,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	36,800,000	36,800,000
Income tax expense			$ 300,000
State and Local Jurisdiction [Member] | Research Tax Credit Carryforward [Member]
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	$ 9,800,000	$ 9,800,000