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Note 5 - Defined Benefit Plan (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Schedule of Defined Benefit Plans Disclosures [Table Text Block]
  

 

Pension Benefits

Three Months Ended March, 31

 
  

2022

  

2021

 

Service cost

 $324  $361 

Interest cost

  204   184 

Expected return on plan assets

  (629

)

  (555

)

Amortization of prior service cost

  -

 

  (3

)

Recognized net actuarial loss

  110   208 

Net periodic benefit cost

 $9  $195