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Note 12 - Other Income (Expense), Net (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Schedule of Other Nonoperating Income (Expense) [Table Text Block]
  

Three Months Ended March 31,

 
  

2022

  

2021

 

Interest income

 $3,461  $2,282 

Amortization of premium on available-for-sale securities

  (1,348)  (813)

Gain (loss) on deferred compensation plan investments

  (2,192)  1,177 

Foreign currency exchange gain (loss)

  (50)  15 

Other

  (505)  (74)

Total

 $(634) $2,587