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Note 11 - Business Segment Information - Segment Activity (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Revenue | $ 107,712 | $ 106,795 |
Segment contribution | 5,701 | 7,368 |
Other income | (1,322) | 597 |
Income tax provision (benefit) | 1,692 | 1,457 |
Non-controlling interest | 99 | 109 |
Net income attributable to Ultralife | 5,232 | 5,205 |
Total assets | 137,701 | 144,557 |
Capital expenditures | 3,101 | 6,281 |
Goodwill | 27,018 | 26,753 | $ 20,109
Depreciation and amortization of intangible assets | 2,935 | 2,745 |
Stock-based compensation | 943 | 753 |
Battery & Energy Products Segment [Member] |  |  |
Revenue | 91,907 | 83,996 |
Segment contribution | 23,400 | 22,813 |
Total assets | 85,112 | 79,413 |
Capital expenditures | 3,031 | 5,805 |
Goodwill | 15,525 | 15,260 | 8,616
Depreciation and amortization of intangible assets | 2,269 | 2,104 |
Stock-based compensation | 446 | 355 |
Communications Systems Segment [Member] |  |  |
Revenue | 15,805 | 22,799 |
Segment contribution | 5,759 | 8,352 |
Total assets | 26,425 | 40,458 |
Capital expenditures | 0 | 44 |
Goodwill | 11,493 | 11,493 | $ 11,493
Depreciation and amortization of intangible assets | 342 | 364 |
Stock-based compensation | 155 | 119 |
Corporate Segment [Member] |  |  |
Revenue | 0 | 0 |
Segment contribution | (23,458) | (23,797) |
Other income | (1,322) | 597 |
Income tax provision (benefit) | 1,692 | 1,457 |
Non-controlling interest | 99 | 109 |
Total assets | 26,164 | 24,686 |
Capital expenditures | 70 | 432 |
Goodwill | 0 | 0 |
Depreciation and amortization of intangible assets | 324 | 277 |
Stock-based compensation | $ 342 | $ 279 |

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