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Note 4 - Periodic Pension Expense (Tables)
9 Months Ended
Sep. 30, 2022
Notes Tables  
Schedule of Net Benefit Costs [Table Text Block]
  

Three Months Ended September 30,

  

Nine Months Ended September 30,

 
  

2022

  

2021

  

2022

  

2021

 

Service cost - benefits earned during the period

 $51  $46  $153  $138 

Interest cost on projected benefit obligation

  100   84   300   424 

Expected return on plan assets

  -   -   -   (597)

Recognized actuarial loss

  428   375   1,284   1,501 

Pension plan termination charge

  -   -   -   6,945 

Net periodic pension cost

 $579  $505  $1,737  $8,411