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Note 16 - Segment Reporting - Segment Reporting (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2023 | Dec. 31, 2022
Revenues from external customers |  |  |  |  |  |  |  |  | $ 203,477 | $ 176,759
Revenue from Contract with Customer, Including Assessed Tax | $ 46,598 | $ 57,163 | $ 50,843 | $ 48,873 | $ 40,060 | $ 44,843 | $ 50,012 | $ 41,844 | 203,477 | 176,759
Operating income (loss) | 2,274 | $ 5,367 | $ 2,216 | $ 1,282 | (2,102) | $ (520) | $ (1,912) | $ (2,073) | 11,139 | (6,607)
Depreciation and amortization |  |  |  |  |  |  |  |  | 6,383 | 6,060
Capital expenditures |  |  |  |  |  |  |  |  | 6,405 | 3,098
Total assets | 135,156 |  |  |  | 144,540 |  |  |  | 135,156 | 144,540
Operating Segments [Member] | Heavy Fabrications [Member] |  |  |  |  |  |  |  |  |  |
Revenues from external customers |  |  |  |  |  |  |  |  | 133,368 | 117,194
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  | 133,368 | 117,206
Operating income (loss) |  |  |  |  |  |  |  |  | 15,006 | (1,044)
Depreciation and amortization |  |  |  |  |  |  |  |  | 3,517 | 3,446
Capital expenditures |  |  |  |  |  |  |  |  | 4,739 | 2,601
Total assets | 46,931 |  |  |  | 45,475 |  |  |  | 46,931 | 45,475
Operating Segments [Member] | Gearing [Member] |  |  |  |  |  |  |  |  |  |
Revenues from external customers |  |  |  |  |  |  |  |  | 45,408 | 42,572
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  | 45,408 | 42,588
Operating income (loss) |  |  |  |  |  |  |  |  | 1,846 | 43
Depreciation and amortization |  |  |  |  |  |  |  |  | 2,270 | 1,978
Capital expenditures |  |  |  |  |  |  |  |  | 1,398 | 446
Total assets | 48,599 |  |  |  | 51,944 |  |  |  | 48,599 | 51,944
Operating Segments [Member] | Industrial Solutions [Member] |  |  |  |  |  |  |  |  |  |
Revenues from external customers |  |  |  |  |  |  |  |  | 24,701 | 16,993
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  | 25,159 | 17,804
Operating income (loss) |  |  |  |  |  |  |  |  | 3,160 | 120
Depreciation and amortization |  |  |  |  |  |  |  |  | 380 | 397
Capital expenditures |  |  |  |  |  |  |  |  | 214 | 48
Total assets | 16,295 |  |  |  | 12,775 |  |  |  | 16,295 | 12,775
Operating Segments [Member] | Corporate Segment [Member] |  |  |  |  |  |  |  |  |  |
Revenues from external customers |  |  |  |  |  |  |  |  | 0 | 0
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  | 0 | 0
Operating income (loss) |  |  |  |  |  |  |  |  | (8,884) | (5,722)
Depreciation and amortization |  |  |  |  |  |  |  |  | 216 | 239
Capital expenditures |  |  |  |  |  |  |  |  | 54 | 3
Total assets | 58,487 |  |  |  | 224,856 |  |  |  | 58,487 | 224,856
Consolidation, Eliminations [Member] |  |  |  |  |  |  |  |  |  |
Revenues from external customers |  |  |  |  |  |  |  |  | 0 | 0
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  | (458) | (839)
Operating income (loss) |  |  |  |  |  |  |  |  | 11 | (4)
Depreciation and amortization |  |  |  |  |  |  |  |  | 0 | 0
Capital expenditures |  |  |  |  |  |  |  |  | 0 | 0
Total assets | $ (35,156) |  |  |  | $ (190,510) |  |  |  | (35,156) | (190,510)
Intersegment Eliminations [Member] |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  | (458) | (839)
Intersegment Eliminations [Member] | Heavy Fabrications [Member] |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  | 0 | 12
Intersegment Eliminations [Member] | Gearing [Member] |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  | 0 | 16
Intersegment Eliminations [Member] | Industrial Solutions [Member] |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  | 458 | 811
Intersegment Eliminations [Member] | Corporate Segment [Member] |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  | $ 0 | $ 0

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