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Note 9 - Per Share Data - Unissued Shares of Common Stock Were Reserved for the Following Purposes (Details) - shares	Mar. 29, 2025	Dec. 28, 2024
Future grants of options or shares (in shares)	365,680	295,680
Shares reserved for employee stock purchase plan (in shares)	233,927	252,119
Total (in shares)	1,002,627	1,137,220
Time-based Restricted Stock Units [Member]
Restricted stock units outstanding (in shares)	215,520	289,421
Performance-based Restricted Stock Units [Member]
Restricted stock units outstanding (in shares)	187,500	300,000

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+ References

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- Definition

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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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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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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