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Note 10 - Other Income (Tables)
6 Months Ended
Jun. 30, 2023
Notes Tables  
Schedule of Other Nonoperating Income (Expense) [Table Text Block]
   

Three Months Ended

   

Six Months Ended

 
   

June 30,

   

June 30,

 
   

2023

   

2022

   

2023

   

2022

 

Interest income

  $ 2,059     $ 424     $ 3,930     $ 443  

Realized gain on disposal of equipment

          69             70  

Total other income

  $ 2,059     $ 493     $ 3,930     $ 513