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Revenues - Schedule of Disaggregated Revenues by Source (Details) - USD ($) | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Disaggregation of Revenue [Line Items] |  |
Net sales | $ 84,803,832 | $ 58,480,602
Storage tank and vessel |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 9,828,955 | 5,775,772
Seamless carbon steel pipe and tube |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 8,586,505 | 8,432,613
Stainless steel pipe |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 45,995,384 | 31,283,862
Galvanized pipe |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 6,692,235 | 0
Specialty chemicals |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | $ 13,700,753 | $ 12,988,355

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
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