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Note 9 - Pension and Other Postretirement Benefits (Tables)
6 Months Ended
Jun. 28, 2025
Notes Tables  
Schedule of Defined Benefit Plans Disclosures [Table Text Block]
    Fiscal Quarter Ended     Fiscal Quarter Ended  
   

June 28, 2025

   

June 29, 2024

 
   

Pension

   

OPEB

   

Pension

   

OPEB

 
   

Plans

   

Plans

   

Plans

   

Plans

 

Net service cost

  $ 66     $ 3     $ 66     $ 4  

Interest cost

    205       28       190       27  

Expected return on plan assets

    (174 )           (209 )      

Amortization of actuarial losses (gains)

    2       (8 )     4       (3 )

Net periodic benefit cost

  $ 99     $ 23     $ 51     $ 28  
   

Six Fiscal Months Ended

   

Six Fiscal Months Ended

 
   

June 28, 2025

   

June 29, 2024

 
   

Pension

   

OPEB

   

Pension

   

OPEB

 
   

Plans

   

Plans

   

Plans

   

Plans

 

Net service cost

  $ 129     $ 7     $ 133     $ 8  

Interest cost

  $ 406     $ 57       381       54  

Expected return on plan assets

  $ (343 )   $       (419 )      

Amortization of actuarial losses (gains)

    5       (16 )     9       (6 )

Net periodic benefit cost

  $ 197     $ 48     $ 104     $ 56