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Interest expense, net (Tables)
9 Months Ended
Oct. 31, 2015
Interest expense, net [Abstract]  
Interest income and interest expense [Table Text Block]
 
Three Months Ended October 31,
Nine Months Ended October 31,
 
2015

2014

2015

2014

Interest expense

$335


$432


$872


$1,175

Interest income
(124
)
(139
)
(415
)
(382
)
Interest expense, net

$211


$293


$457


$793