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Note 5 - Employee Benefit Plans - The Changes in the Post-retirement Benefit Obligations (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 25, 2023
Mar. 26, 2022
Mar. 27, 2021
Post-retirement benefit obligation, at beginning of fiscal year $ 1,326 $ 1,831 $ 1,509
Service cost 17 96 84
Interest cost 45 52 48
Plan Amendments 193 0 0
Benefits paid (136) (125) (95)
Actuarial (gain) loss (179) (528) 285
Post-retirement benefit obligation, at end of fiscal year 1,266 1,326 1,831
Fair value of plan assets, at end of fiscal year 0 0 0
Funded status, at end of fiscal year (1,266) (1,326) (1,831)
Accumulated post-retirement benefit obligation, at end of fiscal year $ 1,266 $ 1,326 $ 1,831