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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