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Interest expense, net
 3 Months Ended
Apr. 30, 2015
Interest expense, net [Abstract]  
Interest Income and Interest Expense Disclosure [Text Block]
Interest expense, net.
 
Three Months Ended April 30,
 
2015

2014

Interest expense

$268


$352

Interest income
(274
)
(115
)
Interest expense, net

($6
)

$237