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Note 10 - Per Share Data (Tables) | 12 Months Ended
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Dec. 31, 2016
Notes Tables |
Schedule of Weighted Average Number of Shares [Table Text Block] |
|  | Fiscal Years Ended |
|  | December 31, 2016 |  |  | January 2, 2016 |
Basic weighted average shares outstanding |  |  | 12,302,558 |  |  |  | 12,658,466 |
Dilutive effect of outstanding restricted share units and stock options |  |  | 120,790 |  |  |  | 242,484 |
Weighted average dilutive shares outstanding |  |  | 12,423,348 |  |  |  | 12,900,950 |
Unissued Shares of Common Stock [Table Text Block] |
|  | December 31, 2016 |  |  | January 2, 2016 |
Exercise of options outstanding |  |  | 42,000 |  |  |  | 44,500 |
Time-based restricted share units outstanding |  |  | 197,734 |  |  |  | 208,834 |
Performance-based restricted share units outstanding |  |  | 200,000 |  |  |  | 0 |
Future grants of options or shares |  |  | 619,266 |  |  |  | 382,000 |
Shares reserved for employee stock purchase plan |  |  | 268,211 |  |  |  | 349,436 |
Total |  |  | 1,327,211 |  |  |  | 984,770 |

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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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