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Note 10 - Per Share Data (Tables) | 6 Months Ended
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Jun. 28, 2014
Earnings Per Share [Abstract] |
Schedule of Weighted Average Number of Shares [Table Text Block] |
|  | Thirteen Week Periods Ended |  |  | Twenty-Six Week Periods Ended |
|  | June 28, 2014 |  |  | June 29, 2013 |  |  | June 28, 2014 |  |  | June 29, 2013 |
Basic weighted average shares outstanding |  |  | 12,488,420 |  |  |  | 12,324,868 |  |  |  | 12,471,712 |  |  |  | 12,317,967 |
Dilutive effect of outstanding stock options |  |  | 189,552 |  |  |  | 99,569 |  |  |  | 186,686 |  |  |  | 85,742 |
Weighted average dilutive shares outstanding |  |  | 12,677,972 |  |  |  | 12,424,437 |  |  |  | 12,658,398 |  |  |  | 12,403,709 |
Unissued Shares of Common Stock [Table Text Block] |
|  | June 28, 2014 |  |  | December 28, 2013 |
Exercise of options outstanding |  |  | 226,400 |  |  |  | 276,900 |
Restricted stock awards outstanding |  |  | 300,000 |  |  |  | 300,000 |
Future grants of options or shares |  |  | 19,100 |  |  |  | 34,100 |
Shares reserved for employee stock purchase plan |  |  | 155,714 |  |  |  | 189,576 |
Total |  |  | 701,214 |  |  |  | 800,576 |

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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