Stock-Based Compensation and Stockholders' Rights (Textual) (Details) (USD $)					12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Oct. 15, 1996	Oct. 15, 1996 Series A Junior Participating Cumulative Preferred Stock [Member]	Jan. 31, 2013 Restricted Stock or Stock Units [Member]	Jan. 31, 2012 Restricted Stock or Stock Units [Member]	Jan. 31, 2011 Restricted Stock or Stock Units [Member]	Jan. 31, 2013 Restricted Stock or Stock Units [Member] 2007 Plan [Member]	Jan. 31, 2013 Restricted Stock or Stock Units [Member] 2011 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, par value	$ 0.01	$ 0.01	$ 0.001
Grant of stock option or awards								1,000,000
Granted during the year					669,375	68,960	56,455	118,125	551,250
Stock available for future issuance								13,075	448,750
Rights entitles a stockholder to purchase for an exercise price			$ 50.00
Adjusted for stock splits and stock dividends, price			$ 20.70
Acquire a beneficial interest			20.00%
Preferred stock, shares				200,000
Adjusted by stock splits and stock dividends, Shares				483,153