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Note 10 - Per Share Data (Tables) | 3 Months Ended
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Apr. 04, 2015
Earnings Per Share [Abstract] |
Schedule of Weighted Average Number of Shares [Table Text Block] |
|  | Thirteen Week Periods Ended |
|  | April 4, 2015 |  |  | March 29, 2014 |
Basic weighted average shares outstanding |  |  | 12,456,220 |  |  |  | 12,455,004 |
Dilutive effect of outstanding stock options |  |  | 210,261 |  |  |  | 184,634 |
Weighted average dilutive shares outstanding |  |  | 12,666,481 |  |  |  | 12,639,638 |
Unissued Shares of Common Stock [Table Text Block] |
|  | April 4, 2015 |  |  | January 3, 2015 |
Exercise of options outstanding |  |  | 49,500 |  |  |  | 53,000 |
Restricted stock awards outstanding |  |  | 496,667 |  |  |  | 500,000 |
Future grants of options or shares |  |  | 425,000 |  |  |  | 425,000 |
Shares reserved for employee stock purchase plan |  |  | 89,544 |  |  |  | 122,484 |
Total |  |  | 1,060,711 |  |  |  | 1,100,484 |

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- Definition The tabular disclosure for unissued shares of common stock. + References No definition available. + Details
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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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