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Note 2 - Business Combination (Details Textual) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 7 Months Ended 9 Months Ended
Sep. 02, 2026
Feb. 23, 2026
Sep. 30, 2026
Sep. 30, 2026
Sep. 30, 2026
Sep. 30, 2026
Serpentix Conveyor, LLC [Member]            
Business Combination, Voting Equity Interest Acquired, Percentage 100.00%          
Business Combination, Consideration Transferred $ 51,500          
Business Combination, Acquisition-Related Cost, Expense       $ 400   $ 400
Business Combination, Acquiree's Revenue since Acquisition Date, Actual     $ 900      
Boughton’s Precast, Inc. [Member]            
Business Combination, Voting Equity Interest Acquired, Percentage   100.00%        
Business Combination, Consideration Transferred   $ 9,000        
Business Combination, Acquisition-Related Cost, Expense       $ 0   $ 100
Business Combination, Acquiree's Revenue since Acquisition Date, Actual         $ 3,800