Condensed Statements of Income (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	May 31, 2013	May 31, 2012
Statements of Income [Abstract]
Net sales	$ 2,276	$ 2,068
Cost of sales	1,670	1,603
Gross profit	606	465
Selling, general and administrative expenses	445	315
Operating income	161	150
Other income (expenses):
Interest income	9	15
Other, net (Note 7)	86	0
Income before provision for income taxes	256	165
Provision for income taxes	4	4
Net income	252	161
Other comprehensive income:
Unrealized gain on investments	10	0
Total comprehensive income	$ 262	$ 161
Income per share from operating income - Basic	$ 0.07	$ 0.07
Income per share from operating income - Diluted	$ 0.07	$ 0.06
Net income per share - Basic	$ 0.12	$ 0.07
Net income per share - Diluted	$ 0.11	$ 0.06
Weighted average shares outstanding - Basic	2,177,832	2,269,006
Weighted average shares outstanding - Diluted	2,403,591	2,483,886