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Note 6 - Stock-based Compensation - Summary of Restricted Stock Units (Details) - Restricted Stock Units (RSUs) [Member] shares in Thousands	12 Months Ended
	Mar. 25, 2023 $ / shares shares
April 2018, First Issuance [Member]
Number of units granted (in shares)	1
Grant date fair value per unit (in dollars per share) | $ / shares	$ 15.65
Number of shares issued (in shares)	1
April 2017 [Member]
Number of units granted (in shares)	62
Grant date fair value per unit (in dollars per share) | $ / shares	$ 12.90
Number of shares issued (in shares)	49
July 2020 [Member]
Number of units granted (in shares)	1
Grant date fair value per unit (in dollars per share) | $ / shares	$ 27.08
Number of shares issued (in shares)	1
September 2019 [Member]
Number of units granted (in shares)	18
Grant date fair value per unit (in dollars per share) | $ / shares	$ 22.77
Number of shares issued (in shares)	18
October 2018 [Member]
Number of units granted (in shares)	1
Grant date fair value per unit (in dollars per share) | $ / shares	$ 20.81
Number of shares issued (in shares)	1
January 2021 [Member]
Number of units granted (in shares)	3
Grant date fair value per unit (in dollars per share) | $ / shares	$ 34.68
Number of shares issued (in shares)	3
May 2018, First Issuance [Member]
Number of units granted (in shares)	29
Grant date fair value per unit (in dollars per share) | $ / shares	$ 15.30
Number of shares issued (in shares)	29
April 2018, Second Issuance [Member]
Number of units granted (in shares)	1
Grant date fair value per unit (in dollars per share) | $ / shares	$ 15.65
Number of shares issued (in shares)	1
May 2018, Second Issuance [Member]
Number of units granted (in shares)	29
Grant date fair value per unit (in dollars per share) | $ / shares	$ 15.30
Number of shares issued (in shares)	19
September 2020, First Issuance [Member]
Number of units granted (in shares)	14
Grant date fair value per unit (in dollars per share) | $ / shares	$ 28.52
Number of shares issued (in shares)	14
October 2018, Second Issuance [Member]
Number of units granted (in shares)	1
Grant date fair value per unit (in dollars per share) | $ / shares	$ 20.81
Number of shares issued (in shares)	1
April 2019 [Member]
Number of units granted (in shares)	20
Grant date fair value per unit (in dollars per share) | $ / shares	$ 23.50
Number of shares issued (in shares)	20
April 2019, Second Issuance [Member]
Number of units granted (in shares)	20
Grant date fair value per unit (in dollars per share) | $ / shares	$ 23.50
Number of shares issued (in shares)	16
July 2022 [Member]
Number of units granted (in shares)	1
Grant date fair value per unit (in dollars per share) | $ / shares	$ 59.33
Number of shares issued (in shares)	1
September 2021 [Member]
Number of units granted (in shares)	7
Grant date fair value per unit (in dollars per share) | $ / shares	$ 66.09
Number of shares issued (in shares)	7
September 2022 [Member]
Number of units granted (in shares)	1
Grant date fair value per unit (in dollars per share) | $ / shares	$ 73.30
Number of shares issued (in shares)	1
October 2018, Third Issuance [Member]
Number of units granted (in shares)	1
Grant date fair value per unit (in dollars per share) | $ / shares	$ 20.81
Number of shares issued (in shares)	1

X

- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(01)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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X

- Definition

Net number of non-option equity instruments granted to participants.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(1)
-SubTopic 10
-Topic 718
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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X

- Definition

Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-SubTopic 10
-Topic 505
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1

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