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Note 10 - Business Segment Information - Segment Activity (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Revenue | $ 98,267 | $ 107,712
Segment contribution | 35 | 5,701
Other income (expense) | 186 | (1,322)
Income tax provision (benefit) | 79 | 1,692
Non-controlling interest | 4 | 99
Net loss attributable to Ultralife | (234) | 5,232
Total assets | 159,538 | 137,701
Capital expenditures | 2,814 | 3,101
Goodwill | 38,068 | 27,018
Depreciation and amortization of intangible assets | 3,539 | 2,935
Stock-based compensation | 671 | 943
Battery & Energy Products Segment [Member] |  |
Revenue | 87,083 | 91,907
Segment contribution | 21,063 | 23,400
Other income (expense) |  |
Total assets | 110,633 | 85,112
Capital expenditures | 2,104 | 3,031
Goodwill | 26,575 | 15,525
Depreciation and amortization of intangible assets | 2,847 | 2,269
Stock-based compensation | 298 | 446
Communications Systems Segment [Member] |  |
Revenue | 11,184 | 15,805
Segment contribution | 3,579 | 5,759
Other income (expense) |  |
Total assets | 25,359 | 26,425
Capital expenditures | 255 | 0
Goodwill | 11,493 | 11,493
Depreciation and amortization of intangible assets | 326 | 342
Stock-based compensation | 125 | 155
Corporate Segment [Member] |  |
Revenue | 0 | 0
Segment contribution | (24,607) | (23,458)
Other income (expense) | 186 | (1,322)
Income tax provision (benefit) | 79 | 1,692
Non-controlling interest | 4 | 99
Total assets | 23,546 | 26,164
Capital expenditures | 455 | 70
Goodwill | 0 | 0
Depreciation and amortization of intangible assets | 366 | 324
Stock-based compensation | $ 248 | $ 342

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