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Stock Based Compensation (Details Textual) (USD $)
 6 Months Ended
Jul. 31, 2012
Jan. 31, 2012
Jul. 31, 2011
Oct. 15, 1996
Stock Based Compensation (Textual) [Abstract]        
Preferred stock, shares 0 0 0  
Stock Based Compensation (Additional Textual) [Abstract]        
Preferred stock redeemed $ 0.01 $ 0.01 $ 0.01 $ 0.001
Maximum term of stock options 10 years      
Stock Options Exercisable Period 5 years      
Grants of Restricted Stock, issued date Oct. 25, 2016      
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%
Number of preferred stock right paid as dividend       1
Stockholders rights condition description       Each of the Rights entitles a stockholder to purchase for an exercise price of $50.00 ($20.70, as adjusted for stock splits and stock dividends), subject to adjustment, one one-hundredth of a share of Series A Junior Participating Cumulative Preferred Stock of the Company, or under certain circumstances, shares of common stock of the Company or a successor company with a market value equal to two times the exercise price
2011 Stock Incentive Plan [Member]
        
Stock Based Compensation (Textual) [Abstract]        
Grant of stock option or awards 1,000,000      
Restricted stock available for future issuance 448,750      
Options outstanding 0      
2007 Stock Incentive Plan [Member]
        
Stock Based Compensation (Textual) [Abstract]        
Grant of stock option or awards 1,000,000      
Restricted stock available for future issuance 13,075      
Options outstanding 0      
Series A Junior Participating Cumulative Preferred Stock [Member]
        
Stock Based Compensation (Textual) [Abstract]        
Preferred stock, shares       200,000
Adjusted by stock splits and stock dividends, Shares       483,153