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Note 4 - Defined Benefit Plan (Tables)
3 Months Ended
Mar. 31, 2023
Notes Tables  
Schedule of Defined Benefit Plans Disclosures [Table Text Block]
  

Pension Benefits

 
  

Three Months Ended March 31,

 
  

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