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Note 13 - Other Income (Expense), Net (Tables)
12 Months Ended
Nov. 30, 2020
Notes Tables  
Schedule of Other Nonoperating Income (Expense) [Table Text Block]
  

Years ended November 30,

 
  

2020

  

2019

  

2018

 

Interest income

 $1,744  $4,190  $1,998 

Change in fair market value of marketable securities

  431   93    

Foreign exchange gain (loss)

  (606)  20   (171)

Other gain (loss)

     92   (76)
  $1,569  $4,395  $1,751