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Note 10 - Business Segment Information - Segment Activity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues	$ 41,927	$ 31,916
Segment contribution	4,063	26
Other income (expense)	(456)	(494)
Income tax provision (benefit)	(703)	133
Non-controlling interest	(13)	(11)
Net loss attributable to Ultralife	2,891	(346)
Battery & Energy Products Segment [Member]
Revenues	34,989	28,470
Segment contribution	8,986	6,512
Communications Systems Segment [Member]
Revenues	6,938	3,446
Segment contribution	2,484	924
Corporate Segment [Member]
Revenues	0	0
Segment contribution	(7,407)	(7,410)
Other income (expense)	(456)	(494)
Income tax provision (benefit)	(703)	133
Non-controlling interest	$ (13)	$ (11)

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