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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 | 9 Months Ended
--- | --- | ---
Sep. 30, 2012 | Oct. 02, 2011 | Sep. 30, 2012 | Oct. 02, 2011
Net Income (Loss) from continuing operations attributable to Ultralife | $ 1,479 | $ 1,359 | $ (3,169) | $ 286
Net Income (Loss) from continuing operations attributable to Ultralife common shareholders (a) | 1,479 | 1,359 | (3,169) | 286
Net Income (Loss) from continuing operations attributable to Ultralife common shareholders - Adjusted (b) | 1,479 | 1,359 | (3,169) | 286
Net Income (Loss) from discontinued operations attributable to Ultralife common shareholders (c) | 200 | 4 | 178 | (4,174)
Net Income (Loss) from discontinued operations attributable to Ultralife common shareholders - Adjusted (d) | $ 200 | $ 4 | $ 178 | $ (4,174)
Average Common Shares Outstanding – Basic (e) (in Shares) | 17,418,000 | 17,313,000 | 17,390,000 | 17,295,000
Effect of Dilutive Securities: |  |  |  |
Stock Options / Warrants (in Shares) | 0 | 259,552 |  |
Average Common Shares Outstanding – Diluted (f) (in Shares) | 17,418,000 | 17,341,000 | 17,390,000 | 17,295,000
EPS – Basic (a/e) - continuing operations (in Dollars per share) | $ 0.09 | $ 0.08 | $ (0.18) | $ 0.02
EPS – Basic (c/e) - discontinued operations (in Dollars per share) | $ 0.01 | $ 0.00 | $ 0.01 | $ (0.24)
EPS – Diluted (b/f) - continuing operations (in Dollars per share) | $ 0.09 | $ 0.08 | $ (0.18) | $ 0.02
EPS – Diluted (d/f) - discontinued operations (in Dollars per share) | $ 0.01 | $ 0.00 | $ 0.01 | $ (0.24)
Stock Options / Warrants [Member] |  |  |  |
Effect of Dilutive Securities: |  |  |  |
Stock Options / Warrants (in Shares) |  | 28,000 |  |

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