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Note 10 - Per Share Data - Unissued Shares of Common Stock Were Reserved for the Following Purposes (Details) - shares | Jun. 29, 2019 | Dec. 29, 2018
--- | --- | ---
Future grants of options or shares (in shares) | 267,551 | 442,699
Shares reserved for employee stock purchase plan (in shares) | 326,952 | 386,403
Total (in shares) | 1,034,875 | 1,176,474
Time-based Restricted Stock Units [Member] |  |
Restricted stock units outstanding (in shares) | 120,372 | 147,372
Performance-based Restricted Stock Units [Member] |  |
Restricted stock units outstanding (in shares) | 320,000 | 200,000

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