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Note 2 - Acquisition - Unaudited Pro Forma Information (Details)
$ / shares in Units, $ in Thousands
6 Months Ended
Jun. 26, 2016
USD ($)
$ / shares
Revenue $ 41,204
Operating income 1,274
Net income attributable to Ultralife $ 1,053
Basic (in dollars per share) | $ / shares $ 0.07
Diluted (in dollars per share) | $ / shares $ 0.07