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Note 7 - Diluted Net Income Per Share (Tables) | 9 Months Ended
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Feb. 24, 2013
Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block] |
|  | Three Months Ended February 24, 2013 |  |  | Three Months Ended February 26, 2012 |  |  | Nine Months Ended February 24, 2013 |  |  | Nine Months Ended February 26, 2012 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net income applicable to Common Stockholders |  | $ | 4,789 |  |  | $ | 4,765 |  |  | $ | 18,068 |  |  | $ | 9,917 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average shares for basic net income per share |  |  | 25,839 |  |  |  | 25,538 |  |  |  | 25,752 |  |  |  | 25,944 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options and restricted stock units |  |  | 828 |  |  |  | 287 |  |  |  | 740 |  |  |  | 261 |
Weighted average shares for diluted net income per share |  |  | 26,667 |  |  |  | 25,825 |  |  |  | 26,492 |  |  |  | 26,205 |
Diluted net income per share |  | $ | 0.18 |  |  | $ | 0.18 |  |  | $ | 0.68 |  |  | $ | 0.38 |

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- Definition Tabular disclosure of the numerators and the denominators of the basic and diluted per-share (or per-unit) computations for income from continuing operations, including the effect that has been given to preferred dividends. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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