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Note 5 - Non-operating Income (Tables)
12 Months Ended
Dec. 31, 2024
Notes Tables  
Schedule of Other Nonoperating Income, by Component [Table Text Block]
  

Year Ended December 31,

 
  

2024

  

2023

  

2022

 

Equity in earnings of unconsolidated investments

 $589  $2,015  $477 

Dividends and net realized gains or losses on the sale of securities

  7,973   6,262   5,530 

Interest income

  10,104   8,383   5,134 

Gain on sale of unconsolidated company

  1,024       

Total non-operating income

 $19,690  $16,660  $11,141