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Note 2 - Revenues (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Revenue from Contract with Customer, Including Assessed Tax $ 44,239 $ 35,503 $ 120,312 $ 109,571
Transferred over Time [Member] | Gearing [Member]        
Revenue from Contract with Customer, Including Assessed Tax 835 836 1,272 836
Transferred over Time [Member] | Heavy Fabrications [Member]        
Revenue from Contract with Customer, Including Assessed Tax $ 1,212 $ 1,373 $ 4,874 $ 3,720