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Note 9 - Accumulated Other Comprehensive Loss (Tables)
 3 Months Ended
Apr. 30, 2019
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
   
Foreign
Currency
Translation
Adjustments
  
   
(in thousands)
  
Balance as of January 31, 2019
   $
(7,661
)
Other comprehensive loss before reclassifications
    
(263
 )
Amounts reclassified from accumulated other comprehensive loss
    
—
 
Net current period other comprehensive loss
    
(263
)
Balance as of April 30, 2019
   $
(7,924
)