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Note 9 - Earnings Per Share (Detail) - Basic and diluted earnings per share (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 01, 2012 | Jul. 03, 2011 | Jul. 01, 2012 | Jul. 03, 2011
Net Income (Loss) from continuing operations attributable to Ultralife | $ (3,216) | $ 2,764 | $ (4,647) | $ (1,073)
Net Income (Loss) from continuing operations attributable to Ultralife common shareholders (a) | (3,216) | 2,764 | (4,647) | (1,073)
Net Income (Loss) from continuing operations attributable to Ultralife common shareholders - Adjusted (b) | (3,216) | 2,764 | (4,647) | (1,073)
Net Income (Loss) from discontinued operations attributable to Ultralife common shareholders (c) | 49 | (2,325) | (22) | (4,178)
Net Income (Loss) from discontinued operations attributable to Ultralife common shareholders - Adjusted (d) | $ 49 | $ (2,325) | $ (22) | $ (4,178)
Average Common Shares Outstanding – Basic (e) (in Shares) | 17,396,000 | 17,296,000 | 17,376,000 | 17,286,000
Effect of Dilutive Securities: |  |  |  |
Stock Options / Warrants (in Shares) | 0 | 180,177 |  |
Average Common Shares Outstanding – Diluted (f) (in Shares) | 17,396,000 | 17,308,000 | 17,376,000 | 17,286,000
EPS – Basic (a/e) - continuing operations (in Dollars per share) | $ (0.18) | $ 0.16 | $ (0.27) | $ (0.06)
EPS – Basic (c/e) - discontinued operations (in Dollars per share) | $ 0.00 | $ (0.13) | $ 0.00 | $ (0.24)
EPS – Diluted (b/f) - continuing operations (in Dollars per share) | $ (0.18) | $ 0.16 | $ (0.27) | $ (0.06)
EPS – Diluted (d/f) - discontinued operations (in Dollars per share) | $ 0.00 | $ (0.13) | $ 0.00 | $ (0.24)
Stock Options / Warrants [Member] |  |  |  |
Effect of Dilutive Securities: |  |  |  |
Stock Options / Warrants (in Shares) |  | 12,000 |  |

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