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Note 6 - Impairment of Long-lived Assets (Tables)
 9 Months Ended
Oct. 31, 2018
Notes Tables  
Schedule of Goodwill [Table Text Block]
   
January 31, 2018
  
Foreign exchange change effect
  
October 31, 2018
Goodwill
   $
2,423
 
   $
(154
)
   $
2,269