Statements of Income and Comprehensive Income (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Feb. 28, 2014	Feb. 28, 2013
Statements Of Income and Comprehensive Income [Abstract]
Net sales	$ 8,650	$ 8,424
Cost of sales	6,389	6,585
Gross profit	2,261	1,839
Selling, general and administrative expenses	1,543	1,284
Operating income	718	555
Other income (expenses):
Environmental expenses		(7)
Interest income	28	33
Other, net (Note 12)	163	254
Income before provision for income taxes	909	835
Provision for income taxes	13	11
Net income	896	824
Other comprehensive income
Unrealized gain on investments	1	13
Total comprehensive income	$ 897	$ 837
Income per share from operating income - Basic	$ 0.33	$ 0.25
Income per share from operating income - Diluted	$ 0.30	$ 0.23
Net income per share - Basic	$ 0.41	$ 0.37
Net income per share - Diluted	$ 0.37	$ 0.34
Weighted average shares outstanding - Basic	2,177,832	2,218,650
Weighted average shares outstanding - Diluted	2,404,390	2,433,849