Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition - Schedule of Disaggregated Revenues by Source (Details)

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Revenue Recognition - Schedule of Disaggregated Revenues by Source (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Disaggregation of Revenue [Line Items]    
Net sales $ 69,778 $ 74,697
Fiberglass and steel liquid storage tanks and separation equipment    
Disaggregation of Revenue [Line Items]    
Net sales 141 3,419
Heavy wall seamless carbon steel pipe and tube    
Disaggregation of Revenue [Line Items]    
Net sales 7,818 7,314
Stainless steel pipe and tube    
Disaggregation of Revenue [Line Items]    
Net sales 39,911 43,728
Galvanized pipe and tube    
Disaggregation of Revenue [Line Items]    
Net sales 7,343 6,203
Specialty chemicals    
Disaggregation of Revenue [Line Items]    
Net sales $ 14,565 $ 14,033