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Note 11 - Other Income (Expense), Net (Tables)
9 Months Ended
Aug. 31, 2022
Notes Tables  
Schedule of Other Nonoperating Income (Expense) [Table Text Block]
  

Three months ended August 31,

  

Nine months ended August 31,

 
  

2022

  

2021

  

2022

  

2021

 

Interest income

 $371  $80  $658  $338 

Foreign exchange gain (loss)

  423   906   264   (620)

Change in fair market value of marketable securities

  (647)  (168)  66   316 
  $147  $818  $988  $34