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Note 8 - Employee Benefit Plans (Tables)
3 Months Ended
Dec. 31, 2022
Supplemental Employee Retirement Plan [Member]  
Notes Tables  
Schedule of Net Benefit Costs [Table Text Block]
   

Three Months Ended

 
   

December 31,

   

January 1,

 

(In thousands)

 

2022

   

2022

 

Interest cost

  $ 130     $ 87  

Service cost

    83       100  

Recognized net actuarial loss

    3       69  

Net periodic pension cost

  $ 216     $ 256