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Note 1 - Summary of Operations and Significant Accounting Policies (Details) - Computation of Basic and Diluted Earnings Per Share (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Note 1 - Summary of Operations and Significant Accounting Policies (Details) - Computation of Basic and Diluted Earnings Per Share [Line Items]    
Net Loss from continuing operations attributable to Ultralife (in Dollars) $ (1,054) $ (1,097)
Net Loss from continuing operations attributable to Ultralife common shareholders (a) (in Dollars) (1,054) (1,097)
Net Income (Loss) from discontinued operations attributable to Ultralife common shareholders (c) (in Dollars) $ 128 $ (501)
Average Common Shares Outstanding – Basic (e) (in Shares) 17,465,000 17,403,000
Average Common Shares Outstanding – Diluted (f) (in Shares) 17,465,000 17,403,000
EPS – Basic (a/e) – continuing operations $ (0.06) $ (0.06)
EPS – Basic (c/e) – discontinued operations $ 0.01 $ (0.03)
EPS – Diluted (b/f) – continuing operations $ (0.06) $ (0.06)
EPS – Diluted (d/f) – discontinued operations $ 0.01 $ (0.03)