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Note 2 - Acquisitions (Details Textual) - USD ($)
$ in Millions
Dec. 14, 2020
Aug. 05, 2019
Jan. 02, 2019
Apr. 02, 2018
Action Stainless & Alloys, Inc. [Member]        
Business Combination, Consideration Transferred, Total $ 19.5      
EZ-Dumper [Member]        
Payments to Acquire Businesses, Gross   $ 0.1    
McCullough [Member]        
Business Combination, Consideration Transferred, Total     $ 11.0  
Berlin Metals [Member]        
Business Combination, Consideration Transferred, Total       $ 21.9