Note 11 - Business Segment Information - Segment Activity (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues	$ 33,234	$ 21,761	$ 95,733	$ 74,504
Segment contribution	(586)	(779)	(88)	1,264
Other expense	254	1	22	(76)
Income Tax Expense (Benefit), Total	90	175	171	(290)
Non-controlling interest	3	18	0	(1)
Net loss attributable to Ultralife	(239)	(585)	105	897
Battery & Energy Products Segment [Member]
Revenues	28,583	20,008	87,873	64,994
Segment contribution	5,345	4,792	19,217	16,244
Communications Systems Segment [Member]
Revenues	4,651	1,753	7,860	9,510
Segment contribution	1,370	316	2,102	3,109
Corporate Segment [Member]
Revenues	0	0	0	0
Segment contribution	(7,301)	(5,887)	(21,407)	(18,089)
Other expense	254	1	22	(76)
Income Tax Expense (Benefit), Total	90	175	171	(290)
Non-controlling interest	$ 3	$ 18	$ 0	$ (1)

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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