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Note 4 - Periodic Pension Expense (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Schedule of Net Benefit Costs [Table Text Block]
  

Three Months Ended March 31,

 
  

2022

  

2021

 

Service cost - benefits earned during the period

 $51  $46 

Interest cost on projected benefit obligation

  100   187 

Expected return on plan assets

  -   (358)

Recognized actuarial loss

  428   600 

Net periodic pension cost

 $579  $475