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Debt (Long-term Debt) (Details) - USD ($)
$ in Thousands
Apr. 30, 2016
Jan. 31, 2016
Apr. 30, 2015
Debt Instrument [Line Items]      
Long-term debt $ 24,220 $ 6,607 $ 20,622
Less current portion 18,416 579 14,607
Non-current portion 5,804 6,028 6,015
Revolving Credit Facility [Member]      
Debt Instrument [Line Items]      
Long-term debt 24,140 6,510 20,469
Other Debt [Member]      
Debt Instrument [Line Items]      
Long-term debt $ 80 $ 97 $ 153