PROPERTY, EQUIPMENT AND IMPROVEMENTS (Details) (USD $) In Thousands, unless otherwise specified	Feb. 28, 2015	Feb. 28, 2014
Property, equipment and improvements
Property, equipment and improvements, gross	$ 30,702	$ 23,715
Less accumulated depreciation and amortization	(20,177)	(17,816)
Property, equipment and improvements, net of accumulated depreciation and amortization	10,525	5,899
Leasehold improvements [Member]
Property, equipment and improvements
Property, equipment and improvements, gross	1,833	1,940
Plant equipment and tooling [Member]
Property, equipment and improvements
Property, equipment and improvements, gross	13,355	12,893
Office equipment, computers and furniture [Member]
Property, equipment and improvements
Property, equipment and improvements, gross	8,075	4,594
Software [Member]
Property, equipment and improvements
Property, equipment and improvements, gross	$ 7,439	$ 4,288