Consolidated Statements of Stockholders' Equity (USD $)	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Total
Balance at Jan. 31, 2011	$ 1,672,000	$ 6,232,000	$ 4,094,000	$ (3,163,000)	$ 8,835,000
Balance (in shares) at Jan. 31, 2011	3,749,472
Net income	0	0	392,000	0	392,000
Directors' equity compensation	8,000	52,000	0	0	60,000
Directors' equity compensation (in shares)	19,851
Exercise of stock options	0	1,000	0	0	1,000
Exercise of stock options (in shares)	1,000				1,000
Stock-based compensation	0	127,000	0	0	127,000
Stock-based compensation (in shares)	0
Balance at Jan. 31, 2012	1,680,000	6,412,000	4,486,000	(3,163,000)	9,415,000
Balance (in shares) at Jan. 31, 2012	3,770,323
Net income	0	0	2,522,000	0	2,522,000
Directors' equity compensation	8,000	52,000	0	0	60,000
Directors' equity compensation (in shares)	18,828
Exercise of stock options	1,000	3,000	0	0	4,000
Exercise of stock options (in shares)	3,334				3,300
Stock-based compensation	70,000	(31,000)	0	0	39,000
Stock-based compensation (in shares)	174,000
Balance at Jan. 31, 2013	$ 1,759,000	$ 6,436,000	$ 7,008,000	$ (3,163,000)	$ 12,040,000
Balance (in shares) at Jan. 31, 2013	3,966,485