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Note 9 - Per Share Data - Unissued Shares of Common Stock Were Reserved for the Following Purposes (Details) - shares	Sep. 27, 2025	Dec. 28, 2024
Future grants of options or shares (in shares)	247,417	295,680
Shares reserved for employee stock purchase plan (in shares)	216,574	252,119
Total (in shares)	982,502	1,137,220
Time-based Restricted Stock Units [Member]
Restricted stock units outstanding (in shares)	231,248	289,421
Performance-based Restricted Stock Units [Member]
Restricted stock units outstanding (in shares)	287,263	300,000

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- Definition

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+ References

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X

- Definition

Aggregate number of common shares reserved for future issuance.

+ 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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+ References

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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