Intangible Assets (Tables)

9 Months Ended

Nov. 30, 2012

Intangible Assets [Abstract]

Cost and accumulated amortization of intangible assets

	November 30, 2012				February 29, 2012
	Cost		Accumulated Amortization		Cost		Accumulated Amortization
Customer lists	$	3,611	$	2,788	$	3,611	$	2,701
Non-compete agreements		1,245		1,245		1,245		1,245
Patents		777		708		777		692
Other intangibles		649		498		649		423
	$	6,282	$	5,239	$	6,282	$	5,061