Quarterly Consolidated Financial Data (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Feb. 28, 2014	Nov. 30, 2013	Aug. 31, 2013	May 31, 2013	Feb. 28, 2013	Nov. 30, 2012	Aug. 31, 2012	May 31, 2012	Feb. 28, 2014	Feb. 28, 2013
Selected Quarterly Financial Data [Line Items]
Net sales	$ 3,904	$ 3,721	$ 2,585	$ 4,201	$ 3,924	$ 2,630	$ 2,354	$ 3,117	$ 14,411	$ 12,025
Gross profit	(1,706)	226	224	178	408	295	164	441	(1,078)	1,308
Net income (loss)	$ (3,554)	$ (651)	$ (804)	$ (451)	$ (507)	$ (643)	$ (713)	$ (619)	$ (2,681)	$ 8
Basic net income (loss) per share	$ (0.47)	$ (0.09)	$ (0.11)	$ (0.06)	$ (0.07)	$ (0.09)	$ (0.09)	$ (0.08)	$ (0.72)	$ (0.33)
Diluted net income (loss) per share	$ (0.47)	$ (0.09)	$ (0.11)	$ (0.06)	$ (0.07)	$ (0.09)	$ (0.09)	$ (0.08)	$ (0.35)	$ 0.00