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Note 12 - Employee Retirement Plans (Tables)
12 Months Ended
Dec. 31, 2023
Notes Tables  
Schedule of Changes in Projected Benefit Obligations [Table Text Block]
  

December 31,

 
  

2023

  

2022

 

Change in projected benefit obligation:

        

Benefit obligation at beginning of year

 $5,470  $6,261 

Service cost

  77   115 

Interest cost

  266   153 

Participant contributions

  70   59 

Changes in actuarial assumptions

  (360)  (972)

Benefits paid

  (551)  (146)

Projected benefit obligation at end of year

 $4,972  $5,470 

Amounts recognized in the consolidated balance sheets consisted of:

        

Accrued expenses and other current liabilities

 $280  $240 

Retiree health benefit obligation

  4,692   5,230 
  $4,972  $5,470 
Schedule of Net Benefit Costs [Table Text Block]
  

2023

  

2022

  

2021

 

Components of net postretirement health benefit cost:

            

Service cost

 $77  $115  $137 

Interest cost

  266   153   137 

Amortization of net gain

  (539)  (400)  (312)

Net postretirement healthcare benefit cost

 $(196) $(132) $(38)
Defined Benefit Plan, Assumptions [Table Text Block]
  

Year Ended December 31,

 
  

2023

  

2022

  

2021

 

Discount rate

  5.0%  2.5%  2.1%

Immediate healthcare cost trend rate

  *   **   *** 

Ultimate healthcare cost trend rate

  4.5   4.5   4.5 

Assumed annual reduction in trend rate

  *   **   *** 

Participation

  60   60   60