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Note 11 - Business Segment Information - Segment Activity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues	$ 32,126	$ 26,770	$ 62,499	$ 52,743
Segment contribution	793	1,091	498	2,043
Other expense	(115)	(21)	(232)	(77)
Income Tax Expense (Benefit), Total	(170)	(248)	81	(465)
Non-controlling interest	4	(11)	(3)	(19)
Net loss attributable to Ultralife	512	811	344	1,482
Battery & Energy Products Segment [Member]
Revenues	30,140	22,875	59,290	44,986
Segment contribution	7,151	6,016	13,872	11,452
Communications Systems Segment [Member]
Revenues	1,986	3,895	3,209	7,757
Segment contribution	495	1,251	732	2,793
Corporate Segment [Member]
Revenues	0	0	0	0
Segment contribution	(6,853)	(6,176)	(14,106)	(12,202)
Other expense	(115)	(21)	(232)	(77)
Income Tax Expense (Benefit), Total	(170)	(248)	81	(465)
Non-controlling interest	$ 4	$ (11)	$ (3)	$ (19)

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