Consolidated Balance Sheets (Parenthetical) (USD $)	Jan. 31, 2012	Jan. 31, 2011
Consolidated Balance Sheets [Abstract]
Property, plant and equipment, net of accumulated depreciation	$ 1,469,000
Preferred stock, par value	$ 0.10	$ 0.10
Preferred stock, shares authorized	500,000	500,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value	$ 0.15	$ 0.15
Common stock, shares authorized	30,000,000	30,000,000
Common stock, shares issued	13,661,098	13,602,227
Common stock, shares outstanding	13,657,865	13,598,994
Treasury stock, shares	3,233	3,233