DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2011
DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Income tax benefit (provision)	$ 29,178	$ (61)	$ 172
Reclassification adjustment for foreign currency loss included in net income		801
Cumulative foreign currency translation loss	65
Foreign transaction exchange gains (losses)	$ (43)	$ (45)	$ 40
Annual revenues [Member] | Customer A [Member]
DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Concentration percentage	22.10%	28.30%	31.00%
Accounts receivable [Member] | Customer A [Member]
DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Concentration percentage	18.40%	33.40%
Accounts receivable [Member] | Customer B [Member]
DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Concentration percentage	6.60%	11.10%
Inventory purchases [Member] | Major supplier [Member]
DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Concentration percentage	54.00%	50.00%
Accounts payable [Member] | Major supplier [Member]
DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Concentration percentage	63.00%