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Note 9 - Business Segment Information - Segment Activity (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Revenue | [1] | $ 87,190 | $ 85,531 |
Segment Contribution |  | 6,555 | 6,476 |
Other Income (Expenses) |  | 58 | (181) |
Income Tax Benefit (Expenses) |  | 18,386 | 1,369 |
Non-Controlling Interest |  | (69) | (16) |
Net Income Attributable to Ultralife |  | 24,930 | 7,648 |
Total Assets |  | 120,104 | 97,186 |
Capital Expenditures |  | 4,185 | 1,290 |
Goodwill |  | 20,109 | 20,458 | $ 19,965
Depreciation and Amortization of Intangible Assets |  | 2,369 | 2,427 |
Stock-Based Compensation |  | 890 | 653 |
Battery & Energy Products Segment [Member] |  |  |  |
Revenue | [1] | 70,497 | 69,789 |
Segment Contribution |  | 19,574 | 19,659 |
Total Assets |  | 50,511 | 44,720 |
Capital Expenditures |  | 2,948 | 1,015 |
Goodwill |  | 8,616 | 8,965 | 8,472
Depreciation and Amortization of Intangible Assets |  | 1,611 | 1,830 |
Stock-Based Compensation |  | 333 | 301 |
Communications Systems Segment [Member] |  |  |  |
Revenue | [1] | 16,693 | 15,742 |
Segment Contribution |  | 6,009 | 6,573 |
Total Assets |  | 26,875 | 32,169 |
Capital Expenditures |  | 614 | 212 |
Goodwill |  | 11,493 | 11,493 | $ 11,493
Depreciation and Amortization of Intangible Assets |  | 375 | 430 |
Stock-Based Compensation |  | 106 | 88 |
Corporate Segment [Member] |  |  |  |
Revenue |  |  |  |
Segment Contribution |  | (19,028) | (19,756) |
Other Income (Expenses) |  | 58 | (181) |
Income Tax Benefit (Expenses) |  | 18,386 | 1,369 |
Non-Controlling Interest |  | (69) | (16) |
Total Assets |  | 42,718 | 20,297 |
Capital Expenditures |  | 623 | 63 |
Depreciation and Amortization of Intangible Assets |  | 383 | 167 |
Stock-Based Compensation |  | $ 451 | $ 264 |
[1] | Sales classified to U.S. include shipments to U.S.-based prime contractors which in some cases may serve non-U.S. projects

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