v2.4.0.8
Stock options (Narrative) (Details) (USD $)
1 Months Ended 3 Months Ended 9 Months Ended
Jul. 31, 2014
Oct. 31, 2014
Oct. 31, 2013
Oct. 31, 2014
Oct. 31, 2013
Jan. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of shares authorized   2,600,000   2,600,000   600,000
Additional shares available for grants as percentage of capital stock outstanding   3.00%   3.00%    
Increase in authorized shares 2,000,000          
Shares available for grant   631,000   631,000    
Grants to certain directors and key employees       1,946,000    
Expiration period after termination       10 years    
Expiration period from termination of employment       90 days    
Aggregate intrinsic value   $ 479,000 $ 8,400,000 $ 20,000 $ 155,000  
Weighted-average vesting period of non-vested awards expected to vest       3 years 6 months    
Unrecognized stock compensation expense to be recognized in future   1,400,000   1,400,000    
Share based compensation   325,000   793,000    
Vesting criteria for FY 2015
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Percentage of options vested       10.00%    
Minimum adjusted EBITDA to be attained for shares to vest       34,500,000    
Vesting criteria for FY 2016
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Percentage of options vested       20.00%    
Annual growth rate of adjusted EBITDA per share of common stock to be achieved for options to vest       30.00%    
Vesting criteria for FY 2017
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Percentage of options vested       30.00%    
Annual growth rate of adjusted EBITDA per share of common stock to be achieved for options to vest       30.00%    
Vesting criteria for FY 2018
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Percentage of options vested       40.00%    
Annual growth rate of adjusted EBITDA per share of common stock to be achieved for options to vest       25.00%    
Performance Shares
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Performance stock granted   58,000   1,400,000    
Share based compensation   $ 0   $ 436,000    
Directors and Key Employees
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Grants to certain directors and key employees   56,000   487,500    
Vesting period   4 years        
Directors and Key Employees | Vesting Period of Four Year
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Grants to certain directors and key employees       405,000    
Directors and Key Employees | Vest on January 31, 2015
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Grants to certain directors and key employees   82,500