Cost and Accumulated Amortization of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Feb. 28, 2015	Feb. 28, 2014
Finite-Lived Intangible Assets [Line Items]
Cost	$ 4,102	$ 4,102
Accumulated Amortization	3,543	3,418
Patents/designs
Finite-Lived Intangible Assets [Line Items]
Cost	233	233
Accumulated Amortization	233	225
Customer Lists
Finite-Lived Intangible Assets [Line Items]
Cost	2,863	2,863
Accumulated Amortization	2,304	2,187
Non-compete Agreements
Finite-Lived Intangible Assets [Line Items]
Cost	1,000	1,000
Accumulated Amortization	1,000	1,000
Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Cost	6	6
Accumulated Amortization	$ 6	$ 6