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Note 2 - Revenues - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Revenues $ 36,452 $ 50,843 $ 74,068 $ 99,716
Consolidation, Eliminations [Member]        
Revenues (76) (348) (807) (456)
Heavy Fabrications [Member] | Operating Segments [Member]        
Revenues 19,611 33,944 41,628 65,537
Gearing [Member] | Operating Segments [Member]        
Revenues 10,454 10,977 18,791 22,943
Industrial Solutions [Member] | Operating Segments [Member]        
Revenues $ 6,463 $ 6,270 $ 14,456 $ 11,692