Consolidated Balance Sheets (Parentheticals) - $ / shares	Oct. 31, 2015	Jan. 31, 2015
Stockholders' Equity:
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	57,125,435	56,448,663
Common stock, shares outstanding	57,125,435	56,448,663
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	400,000	0
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0