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Note 4 - Periodic Pension Cost (Tables)
3 Months Ended
Mar. 31, 2023
Notes Tables  
Schedule of Net Benefit Costs [Table Text Block]
  

Three Months Ended March 31,

 
  

2023

  

2022

 

Service cost on benefits earned during the period

 $21  $51 

Interest cost on projected benefit obligation

  159   100 

Recognized actuarial loss

  55   428 

Net periodic pension cost

 $235  $579