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Note 4 - Defined Benefit Plan (Tables)
9 Months Ended
Sep. 30, 2023
Notes Tables  
Schedule of Defined Benefit Plans Disclosures [Table Text Block]
  

Pension Benefits

Three Months Ended September 30,

 
  

2023

  

2022

 

Service cost

 $203  $324 

Interest cost

  273   204 

Expected return on plan assets

  (518

)

  (629

)

Amortization of prior service cost

  -   - 

Recognized net actuarial loss

  17   110 

Net periodic benefit (income) cost

 $(25

)

 $9 
  

Pension Benefits

Nine Months Ended September 30,

 
  

2023

  

2022

 

Service cost

 $609  $972 

Interest cost

  819   612 

Expected return on plan assets

  (1,553

)

  (1,887

)

Amortization of prior service cost

  -   - 

Recognized net actuarial loss

  52   330 

Net periodic benefit (income) cost

 $(73

)

 $27