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Stock-Based Compensation - Restricted Stock Awards (Tables)
3 Months Ended
Apr. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
restricted stock vesting criteria [Table Text Block]
Percentile Rank
 
Percentage of
Units Vested
< 33%
 
0%
33%
 
50%
50%
 
100%
100%
 
150%