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Note 15 - Incentive and Stock Option Plans (Details) - Summary of Stock Option Activity (USD $)
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12 Months Ended |
|---|---|
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Dec. 28, 2014
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| Summary of Stock Option Activity [Abstract] | |
| Outstanding at beginning of year | 1,344,079 |
| Outstanding at beginning of year | $ 8.09 |
| Exercised | (872,158) |
| Exercised | $ 5.36 |
| Forfeited | (32,041) |
| Forfeited | $ 13.17 |
| Outstanding at end of year | 439,880 |
| Outstanding at end of year | $ 13.12 |
| Outstanding at end of year | 2 years 160 days |
| Outstanding at end of year | $ 1,757,215 |
| Options exercisable at year end | 439,880 |
| Options exercisable at year end | $ 13.12 |
| Options exercisable at year end | 2 years 160 days |
| Options exercisable at year end | $ 1,757,215 |