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Note 10 - Business Segment Information - Segment Activity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenues	$ 31,916	$ 30,373
Segment contribution	26	(295)
Other expense	(494)	(117)
Tax benefit	133	251
Non-controlling interest	(11)	(7)
Net loss attributable to Ultralife	(346)	(168)
Battery & Energy Products Segment [Member]
Revenues	28,470	29,150
Segment contribution	6,512	6,721
Communications Systems Segment [Member]
Revenues	3,446	1,223
Segment contribution	924	237
Corporate Segment [Member]
Revenues	0	0
Segment contribution	(7,410)	(7,253)
Other expense	(494)	(117)
Tax benefit	133	251
Non-controlling interest	$ (11)	$ (7)

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