INCOME TAXES (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 29, 2016	Feb. 28, 2015	Feb. 28, 2014
INCOME TAXES [Abstract]
Excess tax deductions from share-based payment arrangements	$ 4.5	$ 6.5	$ 12.8
Unrecognized tax benefit from uncertain tax position related to federal research and development tax credits	1.0
Change in valuation allowance	(2.5)
Foreign deferred tax assets	$ 3.1
Valuation allowance percentage	100.00%
Domestic Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 53.0
Domestic Tax Authority [Member] | Research Tax Credit Carryforward [Member]
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	6.7
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	65.0
State and Local Jurisdiction [Member] | Research Tax Credit Carryforward [Member]
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	$ 6.3