CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Jul. 31, 2015	Jan. 31, 2015
Property, plant and equipment, gross	$ 9,773,000	$ 10,914,000
Preferred stock, par value	$ 0.10	$ 0.10
Preferred stock, shares authorized	500,000	500,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.15	$ 0.15
Common stock, shares authorized	30,000,000	30,000,000
Common stock, shares issued	14,792,702	14,634,434
Common stock, shares outstanding	14,789,469	14,631,201
Treasury stock, shares	3,233	3,233
Variable Interest Entity [Member]
Property, plant and equipment, gross		$ 2,658,000