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Note 4 - Sale of Manitowoc Industrial Fabrication Operations (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Sep. 08, 2025
Gain (Loss) on Disposition of Business $ 8,155 $ (0) $ 8,213 $ (0)  
Disposal Group, Held-for-Sale, Not Discontinued Operations [Member] | Certain Assets Used in Industrial Fabrication Operations in Manitowoc, Wisconsin [Member] | Wisconsin Heavy Fabrication, LLC [Member]          
Disposal Group, Consideration         $ 13,500
Gain (Loss) on Disposition of Business $ 8,155   $ 8,213