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 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Disaggregation of Revenue [Line Items]        
Net sales $ 83,087 $ 66,136 $ 152,865 $ 140,833
Fiberglass and steel liquid storage tanks and separation equipment        
Disaggregation of Revenue [Line Items]        
Net sales 550 1,038 691 4,456
Heavy wall seamless carbon steel pipe and tube        
Disaggregation of Revenue [Line Items]        
Net sales 11,131 5,658 18,949 12,972
Stainless steel pipe and tube        
Disaggregation of Revenue [Line Items]        
Net sales 46,360 39,306 86,301 83,034
Galvanized pipe and tube        
Disaggregation of Revenue [Line Items]        
Net sales 10,056 6,016 17,370 12,219
Specialty chemicals        
Disaggregation of Revenue [Line Items]        
Net sales $ 14,990 $ 14,118 $ 29,554 $ 28,152