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Note O - Share-based Compensation - Compensation Cost Charged to Expense Under All Stock-based Incentive Awards (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 26, 2021 | Sep. 27, 2020 | Sep. 26, 2021 | Sep. 27, 2020
Share-based compensation expense | $ 29,000 | $ 29,000 | $ 58,000 | $ 58,000
Share-based Payment Arrangement, Option [Member] |  |  |  |
Share-based compensation expense | 23,000 | 21,000 | 44,000 | 42,000
Restricted Stock [Member] |  |  |  |
Share-based compensation expense | $ 6,000 | $ 8,000 | $ 14,000 | $ 16,000

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