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

Three Months Ended

   

Nine Months Ended

 
   

September 30,

   

September 30,

 
   

2023

   

2022

   

2023

   

2022

 

Interest income

  $ 1,962     $ 623     $ 5,891     $ 1,066  

Realized gain on disposal of equipment

                      70  

Total other income

  $ 1,962     $ 623     $ 5,891     $ 1,136