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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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