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Note 3 - Stock-based Compensation (Details Textual) - USD ($) Pure in Thousands, $ in Millions	3 Months Ended
	Jun. 24, 2023	Jun. 25, 2022
Share-Based Payment Arrangement, Expense, Tax Benefit	$ 0.1	$ 0.5
Share-Based Payment Arrangement, Expense	$ 0.9	0.8
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)	16,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 0.2	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
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	$ 0.6	$ 0.4
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 4.6
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	$ 0.3	$ 0.4
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 2.1
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate	0.00%	0.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)		34,000
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)	6,000
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

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479830/718-10-S99-1

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-Topic 718
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-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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+ References

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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+ References

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-Section 45
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- Definition

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- Definition

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Gross number of share options (or share units) granted during the period.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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