Quarterly Data (Unaudited) (Details) (USD $)	3 Months Ended								12 Months Ended
	Jan. 31, 2013	Oct. 26, 2012	Jul. 27, 2012	Apr. 27, 2012	Jan. 31, 2012	Oct. 28, 2011	Jul. 29, 2011	Apr. 29, 2011	Jan. 31, 2013	Jan. 31, 2012
Sales, net	$ 8,921,000	$ 7,267,000	$ 7,472,000	$ 7,361,000	$ 9,157,000	$ 7,320,000	$ 6,421,000	$ 6,709,000	$ 31,021,000	$ 29,607,000
Gross profit	3,690,000	3,135,000	2,247,000	2,858,000	3,361,000	2,011,000	1,417,000	1,706,000	11,930,000	8,495,000
Operating (loss) income	467,000	765,000	(161,000)	720,000	1,608,000	336,000	(221,000)	(382,000)	1,791,000	1,341,000
Net income (loss)	$ 1,793,000	$ 454,000	$ (138,000)	$ 413,000	$ 730,000	$ 146,000	$ (167,000)	$ (317,000)	$ 2,522,000	$ 392,000
Basic income (loss) per share (in dollars per share)	$ 0.47	$ 0.12	$ (0.04)	$ 0.11	$ 0.19	$ 0.04	$ (0.04)	$ (0.08)	$ 0.67	$ 0.10
Diluted income (loss) per share (in dollars per share)	$ 0.43	$ 0.11	$ (0.04)	$ 0.10	$ 0.18	$ 0.04	$ (0.04)	$ (0.08)	$ 0.62	$ 0.10