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Note 9 - Per Share Data - Unissued Shares of Common Stock Were Reserved for the Following Purposes (Details) - shares	Mar. 30, 2024	Dec. 30, 2023
Future grants of options or shares (in shares)	296,040	603,044
Shares reserved for employee stock purchase plan (in shares)	274,941	297,730
Total (in shares)	1,199,899	1,377,392
Time-based Restricted Stock Units [Member]
Restricted stock units outstanding (in shares)	328,918	376,618
Performance-based Restricted Stock Units [Member]
Restricted stock units outstanding (in shares)	300,000	100,000

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+ References

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(ii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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