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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 | 9 Months Ended
--- | --- | ---
Dec. 27, 2020 | Dec. 29, 2019 | Dec. 27, 2020 | Dec. 29, 2019
Share-based compensation expense | $ 29,000 | $ 29,000 | $ 87,000 | $ 87,000
Share-based Payment Arrangement, Option [Member] |  |  |  |
Share-based compensation expense | 21,000 | 21,000 | 64,000 | 64,000
Restricted Stock [Member] |  |  |  |
Share-based compensation expense | $ 8,000 | $ 8,000 | $ 23,000 | $ 23,000

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