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Acquisitions - Narrative (Details) - USD ($) |  |  |  | 3 Months Ended | 6 Months Ended | 10 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 01, 2018 | Mar. 01, 2017 | Feb. 28, 2017 | Dec. 31, 2018 | Jun. 30, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jun. 29, 2018 | Mar. 31, 2017 | Dec. 09, 2016
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition related costs |  |  |  |  |  |  |  | $ 1,211,797 | $ 794,983 | $ 106,227 |  |  |
Goodwill |  |  |  | $ 9,799,992 |  | $ 9,799,992 | $ 6,003,525 | 9,799,992 | 6,003,525 | 1,354,730 |  |  |
Lease term |  |  |  |  |  |  |  |  |  |  | 20 years |  |
Level 3 Inputs |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of earn-out liability |  |  |  | 7,609,384 |  | 7,609,384 | 4,833,850 | 7,609,384 | 4,833,850 | $ 0 |  |  |
Marcegalia USA, Inc. - Galvanized |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price | $ 10,378,281 |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration earn-out period | 4 years |  |  |  |  |  |  |  |  |  |  |  |
Percentage of earn-out payments | 3.00% |  |  |  |  |  |  |  |  |  |  |  |
Forecasted earn-out payments | $ 4,244,939 |  |  |  |  |  |  |  |  |  |  |  |
Fair value of earn-out payments | 3,800,298 |  |  | 3,800,298 |  | 3,800,298 |  | 3,800,298 |  |  |  |  |
Purchase accounting adjustment for intangible assets |  |  |  | 251,000 |  | 251,000 |  |  |  |  |  |  |
Goodwill, purchase accounting adjustments |  |  |  | 251,000 |  | 251,000 |  |  |  |  |  |  |
Goodwill | 3,545,467 |  |  | 3,796,467 |  | 3,796,467 |  | 3,796,467 |  |  |  |  |
Intangible assets | $ 1,424,000 |  |  | 1,173,000 |  | 1,173,000 |  | 1,173,000 |  |  |  |  |
Net sales |  |  |  |  |  |  |  | 11,876,733 |  |  |  |  |
Income before income taxes |  |  |  |  |  |  |  | 64,971 |  |  |  |  |
Marcegalia USA, Inc. - Galvanized | Acquisition-related Costs |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition related costs |  |  |  |  |  |  |  | 666,357 |  |  |  |  |
Marcegalia USA, Inc. - Galvanized | Customer List |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization period for intangible assets | 15 years |  |  |  |  |  |  |  |  |  |  |  |
Marcegalia USA, Inc. - Galvanized | Level 3 Inputs |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of earn-out liability |  |  |  | 3,357,800 |  | 3,357,800 |  | 3,357,800 |  |  |  |  |
Marcegalia USA, Inc. - Galvanized | Level 3 Inputs | Other Current Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of earn-out liability |  |  |  | $ 990,823 |  | $ 990,823 |  | $ 990,823 |  |  |  |  |
Marcegalia USA, Inc. - Galvanized | Measurement Input, Discount Rate |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Discount rate applied to earn-out payments | 0.05 |  |  |  |  |  |  |  |  |  |  |  |
Marcegalia USA, Inc. - Stainless |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  | $ 14,953,513 |  |  |  |  |  |  |  |  |  |
Fair value of earn-out payments |  |  | 3,604,330 |  | $ 4,663,783 |  | 4,663,783 |  | 4,663,783 |  |  | $ 3,604,330 |
Goodwill, purchase accounting adjustments |  |  |  |  |  |  | 1,059,453 |  |  |  |  |  |
Goodwill |  |  | 3,589,342 |  | 4,648,795 |  | 4,648,795 |  | 4,648,795 |  |  | $ 3,589,342 |
Intangible assets |  |  | $ 992,000 |  |  |  | 992,000 |  | 992,000 |  |  |  |
Escrow deposit |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,000,000
Goodwill and earn-out liability, provisional adjustment |  |  |  |  | $ 1,059,453 |  | $ 1,059,453 |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 25,766,689 |  |  |  |
Income before income taxes |  |  |  |  |  |  |  |  | $ 245,408 |  |  |  |
Monthly lease payment |  | $ 33,333 |  |  |  |  |  |  |  |  |  |  |
Lease term |  | 15 months |  |  |  |  |  |  |  |  |  |  |
Marcegalia USA, Inc. - Stainless | Earn-Out Payment |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration earn-out period |  |  | 4 years |  |  |  |  |  |  |  |  |  |
Percentage of earn-out payments |  |  | 3.00% |  |  |  |  |  |  |  |  |  |
Forecasted earn-out payments |  |  | $ 4,063,204 |  |  |  |  |  |  |  |  |  |
Contingent consideration payment, lower limit |  |  | 3,000,000 |  |  |  |  |  |  |  |  |  |
Estimated earn out payments, discounted |  |  | $ 3,604,330 |  |  |  |  |  |  |  |  |  |
Discount rate applicable to future revenue |  |  | 5.00% |  |  |  |  |  |  |  |  |  |
Marcegalia USA, Inc. - Stainless | Customer List |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization period for intangible assets |  |  |  |  |  |  |  |  | 15 years |  |  |  |

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