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Stock-Based Compensation and Stockholders' Rights (Textual) (Details) (USD $)
9 Months Ended 3 Months Ended
Oct. 31, 2014
Oct. 31, 2013
Oct. 31, 2014
Restricted Stock or Stock Units [Member]
2007 Plan [Member]
Oct. 31, 2013
Restricted Stock or Stock Units [Member]
2007 Plan [Member]
Jul. 31, 2014
Restricted Stock or Stock Units [Member]
2011 Plan [Member]
Oct. 31, 2014
Restricted Stock or Stock Units [Member]
2011 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Grant of stock option or awards     2,000,000      
Granted during the year     0 0 0  
Stock available for future issuance     13,075     830,694
Preferred stock, par value $ 0.01 $ 0.01