Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation and Stock Incentive Plans (Details Textual)

v2.4.0.6
Stock-Based Compensation and Stock Incentive Plans (Details Textual) (USD $)
1 Months Ended 3 Months Ended 9 Months Ended
May 31, 2012
Oct. 31, 2012
Oct. 31, 2011
Oct. 31, 2012
Oct. 31, 2011
Jul. 20, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Description       Option awards may be granted to employees at an exercise price per share of not less than 100% of the fair market value per common share on the date of the grant.    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period       3 years    
Share Based Compensation Arrangement By Share Based Payment Award Award Expiration Period       7 years    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 875,000          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number   437,500   437,500    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized           2,800,000
Stock Option Value Per Share   $ 3.78   $ 3.78    
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period       2 years 1 month 6 days    
Fair Value Assumptions, Risk Free Interest Rate       1.22%    
Stock-based compensation expense   $ 728,000 $ 1,018,000 $ 3,056,000 $ 3,134,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value       3,300,000    
Stock Options [Member]
           
Stock-based compensation expense   $ 400,000   $ 800,000