Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Feb. 28, 2013	Feb. 29, 2012
Consolidated Statements of Operations [Abstract]
Net sales	$ 17,428	$ 21,586
Cost of sales	15,058	16,282
Gross profit	2,370	5,304
Selling expenses	1,699	2,360
General and administrative expenses	3,539	3,408
Research and development expenses	1,056	897
Release of warranty liability	(294)
Operating loss	(3,630)	(1,361)
Interest expense	29
Interest income		(2)
Loss before income taxes	(3,659)	(1,359)
Income tax expense	8	62
Net loss	$ (3,667)	$ (1,421)
Net loss per share - basic and diluted	$ (3.13)	$ (1.22)
Weighted average common shares outstanding - basic and diluted	1,171	1,167