Annual report pursuant to Section 13 and 15(d)

Goodwill - Narrative (Details)

v3.20.4
Goodwill - Narrative (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Goodwill [Line Items]            
Goodwill $ 1,355,000     $ 1,355,000 $ 17,558,000 $ 9,800,000
Goodwill impairment       16,203,000 0  
Welded Pipe And Tube            
Goodwill [Line Items]            
Fair value greater than carrying value     1.70%      
Goodwill impairment     $ 0 16,200,000    
Metals Segment            
Goodwill [Line Items]            
Goodwill 0     0 16,203,000 8,445,000
Goodwill impairment 5,500,000 $ 10,700,000   16,203,000    
Metals Segment | Welded Pipe And Tube            
Goodwill [Line Items]            
Goodwill 5,500,000 16,200,000 $ 16,200,000 $ 5,500,000    
Goodwill impairment $ 5,500,000 $ 10,700,000        
Reporting unit, percentage of fair value below carrying amount 24.10% 9.70%   24.10%    
Specialty Chemicals Segment            
Goodwill [Line Items]            
Goodwill $ 1,355,000     $ 1,355,000 $ 1,355,000 $ 1,355,000
Fair value greater than carrying value 7.40%     7.40%    
Goodwill impairment $ 0     $ 0    
Specialty Chemicals Segment | Welded Pipe And Tube            
Goodwill [Line Items]            
Goodwill $ 1,400,000     $ 1,400,000