Note 3 - Stock-based Compensation (Details Textual) - USD ($) Pure in Thousands, $ in Millions	3 Months Ended	9 Months Ended
Dec. 23, 2023	Dec. 23, 2023	Dec. 24, 2022
Share-Based Payment Arrangement, Expense, Tax Benefit		$ 0.7	$ 0.5
Share-Based Payment Arrangement, Expense		$ 3.3	2.8
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate		0.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)		37,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value		$ 0.3	0.2
Proceeds from Stock Options Exercised		$ 0.1	$ 0.1
Board of Directors Member [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)		5 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)		10,000
Director [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)		5 years	5 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)		20,000	10,000
Each Board of Directors Member [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)		10,000
Performance-based Restricted Stock Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)		3 years
Restricted Stock Units (RSUs) [Member]
Share-Based Payment Arrangement, Expense		$ 2.4	$ 1.7
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 4.4	$ 4.4
Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)		5 years	3 years
Share-Based Payment Arrangement, Expense		$ 0.9	$ 1.1
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 2.4	$ 2.4
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate	0.00%	0.00%	0.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)			46,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)		3 years
Share-Based Payment Arrangement, Option [Member] \| Share-Based Payment Arrangement, Employee [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)		3 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)		7,000
Share-Based Payment Arrangement, Option [Member] \| Minimum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)		5 years
Share-Based Payment Arrangement, Option [Member] \| Maximum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)		10 years
The 2021 Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)	600,000	600,000

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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