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Note 10 - Stockholders' Equity (Tables) | 6 Months Ended
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Nov. 30, 2014
Notes Tables |
Schedule of Stockholders Equity [Table Text Block] |
Common Stock Shares |  |  |  |
Balance at May 25, 2014 |  |  | 26,815,253 |
Stock options exercised, net of shares tendered |  |  | 31,235 |
Vested restricted stock units, net of shares tendered |  |  | 29,496 |
Balance at November 30, 2014 |  |  | 26,875,984 |
Common Stock |  |  |  |
Balance at May 25, 2014 |  | $ | 27 |
Stock options exercised, net of shares tendered |  |  | — |
Vested restricted stock units, net of shares tendered |  |  | — |
Balance at November 30, 2014 |  | $ | 27 |
Additional Paid-in Capital |  |  |  |
Balance at May 25, 2014 |  | $ | 131,488 |
Stock options exercised, net of shares tendered |  |  | 100 |
Vested restricted stock units, net of shares tendered |  |  | — |
Taxes paid by Company for stock swaps and restricted stock units |  |  | (12 | )
Stock-based compensation expense |  |  | 748 |
Tax benefit from stock based compensation |  |  | 36 |
Balance at November 30, 2014 |  | $ | 132,360 |
Retained Earnings |  |  |  |
Balance at May 25, 2014 |  | $ | 71,554 |
Net income |  |  | 5,576 |
Balance at November 30, 2014 |  | $ | 77,130 |
Non - controlling Interest |  |  |  |
Balance at May 25, 2014 |  | $ | 1,692 |
Non-controlling interest in net income |  |  | 95 |
Distributions to non-controlling interest |  |  | (196 | )
Balance at November 30, 2014 |  | $ | 1,591 |

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- Definition Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) and of the changes in the number of shares of equity securities during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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