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Note 11 - Business Segment Information - Segment Activity (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Revenue | $ 50,746 | $ 41,927
Cost of products sold | (38,001) | (30,457)
Gross profit | 12,745 | 11,470
Direct SG&A expenses | 9,346 | 7,407
Research and development | (2,404) | (1,756)
Segment contribution | 3,399 | 4,063
Corporate G&A expenses | 9,346 | 7,407
Other expenses, net | (953) | (456)
Income tax provision | (567) | (703)
Non-controlling interest | (14) | (13)
Net income attributable to Ultralife | 1,865 | 2,891
Operating Segments [Member] |  |
Direct SG&A expenses | (4,231) | (3,301)
Segment contribution | 6,110 | 6,413
Corporate G&A expenses | (4,231) | (3,301)
Operating Segments [Member] | Battery & Energy Products Segment [Member] |  |
Revenue | 46,321 | 34,989
Cost of products sold | (34,881) | (26,003)
Gross profit | 11,440 | 8,986
Direct SG&A expenses | (3,865) | (2,907)
Research and development | (1,591) | (1,001)
Segment contribution | 5,984 | 5,078
Corporate G&A expenses | (3,865) | (2,907)
Operating Segments [Member] | Communications Systems Segment [Member] |  |
Revenue | 4,425 | 6,938
Cost of products sold | (3,120) | (4,454)
Gross profit | 1,305 | 2,484
Direct SG&A expenses | (366) | (394)
Research and development | (813) | (755)
Segment contribution | 126 | 1,335
Corporate G&A expenses | (366) | (394)
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] |  |
Revenue | 0 | 0
Cost of products sold | 0 | 0
Gross profit | 0 | 0
Direct SG&A expenses | (2,711) | (2,350)
Research and development | 0 |
Corporate G&A expenses | (2,711) | (2,350)
Other expenses, net | (953) | (456)
Income tax provision | (567) | (703)
Non-controlling interest | $ (14) | $ (13)

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