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Note 5 - Employee Benefit Plans (Details Textual) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 26, 2022 | Mar. 25, 2023 | Mar. 26, 2022 | Mar. 27, 2021
Defined Contribution Plan, Employer Matching Contribution, Percent of Match | 50.00% | 50.00% |  |
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay | 6.00% | 6.00% |  |
Share-Based Payment Arrangement, Expense |  | $ 3.4 | $ 2.3 | $ 1.5
Other Postretirement Benefits Plan [Member] |  |  |  |
Defined Benefit Plan, Effect of One-Percentage-Point Increase on Accumulated Postretirement Benefit Obligation |  | 0.1 |  |
Defined Benefit Plan, Effect of One-Percentage-Point Decrease on Accumulated Postretirement Benefit Obligation |  | 0.1 |  |
Maximum [Member] |  |  |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax |  | $ 0.1 |  |
Employee Stock Purchase Plan [Member] |  |  |  |
Percentage of Market Price |  | 85.00% |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) |  | 650,000 |  |
Employee Stock Purchase Plan [Member] | Maximum [Member] |  |  |  |
Share-Based Payment Arrangement, Expense |  | $ 0.1 | 0.1 | 0.1
The 401K Plan [Member] |  |  |  |
Defined Contribution Plan, Cost |  | 1.2 | 1.1 | $ 0.4
N Q D C Plan [Member] | Other Liabilities [Member] |  |  |  |
Deferred Compensation Liability, Classified, Noncurrent | $ 0.2 | $ 0.2 | $ 0.2 |

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