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Note 10 - Other Income (Expense) (Tables)
3 Months Ended
Feb. 28, 2018
Notes Tables  
Schedule of Other Nonoperating Income (Expense) [Table Text Block]
    Three months ended  
    February 28,
2018
  February 28,
2017
 
Interest income   $
240
    $
247
   
Interest expense    
(1,494
)    
(1,213
)  
Foreign exchange loss    
(116
)    
(161
)  
    $
(1,370
)   $
(1,127
)