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Note 4 - Periodic Pension Expense (Tables)
3 Months Ended
Mar. 31, 2021
Notes Tables  
Schedule of Net Benefit Costs [Table Text Block]
  

Three Months Ended March 31,

 
  

2021

  

2020

 

Service cost - benefits earned during the period

 $46  $38 

Interest cost on projected benefit obligation

  187   216 

Expected return on plan assets

  (358)  (389)

Recognized actuarial loss

  600   320 

Settlement loss

  -   138 

Net periodic pension cost after settlements

 $475  $323