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Note 6 - Impairment of Long-lived Assets (Tables)
6 Months Ended
Jul. 31, 2019
Notes Tables  
Schedule of Goodwill [Table Text Block]
   
January 31, 2019
   
Foreign exchange change effect
   
July 31, 2019
 
Goodwill
  $
2,269
    $
(3
)   $
2,266