INCOME TAXES (Narrative) (Details) (USD $)	12 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2011
INCOME TAXES [Abstract]
Deferred tax assets for Canadian income tax purposes	$ 4,300,000
Income tax benefit (provision)	29,178,000	(61,000)	172,000
Net deferred tax assets	41,016,000	11,837,000
Federal net operating loss carryforwards	64,900,000
State net operating loss carryforwards	81,700,000
Foreign tax credit carryforward	200,000
Federal research and development tax credit carryforwards	4,600,000
State research and development tax credit carryforwards	3,900,000
Unrecognized tax benefit from uncertain tax position relating to federal research and development	$ 1,100,000