Cost and Accumulated Amortization of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Nov. 30, 2013	Feb. 28, 2013
Finite-Lived Intangible Assets [Line Items]
Cost	$ 4,299	$ 4,299
Accumulated Amortization	3,584	3,490
Customer Lists
Finite-Lived Intangible Assets [Line Items]
Cost	2,903	2,903
Accumulated Amortization	2,198	2,110
Noncompete Agreements
Finite-Lived Intangible Assets [Line Items]
Cost	1,015	1,015
Accumulated Amortization	1,015	1,015
Patents/Designs
Finite-Lived Intangible Assets [Line Items]
Cost	233	233
Accumulated Amortization	223	217
Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Cost	148	148
Accumulated Amortization	$ 148	$ 148