Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Aug. 31, 2011	Aug. 31, 2010	Aug. 31, 2011	Aug. 31, 2010
Consolidated Statements of Operations [Abstract]
Net sales	$ 6,140	$ 7,096	$ 10,313	$ 12,598
Cost of sales	4,770	5,916	7,574	10,284
Gross profit	1,370	1,180	2,739	2,314
Selling	584	607	1,043	1,160
General and administrative	821	952	1,766	2,188
Research and development	218	193	417	397
Operating loss	(253)	(572)	(487)	(1,431)
Interest income	1	1	2	2
Loss before income taxes	(252)	(571)	(485)	(1,429)
Income tax expense	15		15
Net loss	$ (267)	$ (571)	$ (500)	$ (1,429)
Net loss per share-basic and diluted	$ (0.23)	$ (0.49)	$ (0.43)	$ (1.22)
Weighted average common shares outstanding-basic and diluted	1,167	1,167	1,167	1,167