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Fair Value (Details) | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) lb $ / lb | Dec. 31, 2016 USD ($) lb $ / lb | Dec. 31, 2015 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Proceeds from available for sale securities | $ 4,141,564 | $ 0 | $ 0
Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments | 310,043 | 0 | 0
Unrealized gains on available for sale securities, net of tax | 355,482 | 0 | 0
Available-for-sale Securities | 537,233 |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Payments on earn-out liability to MUSA sellers | (518,456) | 0 | 0
Fair Value, Inputs, Level 3 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Present Value Contingent Consideration Liability Associated with Acquisition | 4,663,783 |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Beginning balance | 0 |  |
Payments on earn-out liability to MUSA sellers | (518,456) |  |
Interest expense charged during the year | 688,523 |  |
Ending balance | 4,833,850 | 0 |
Specialty Pipe And Tube, Inc. [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Beginning balance |  | 0 |
Change in fair value of contingent consideration liability |  |  | 2,414,115
Ending balance |  |  | 0
Palmer of Texas [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Change in fair value of contingent consideration liability |  |  | $ 2,483,333
Commodity Option [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative asset | $ 9,027 | $ 87,283 |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Derivative, Nonmonetary Notional Amount, Mass | lb | 1,351,494 | 638,168 |
Term Loan [Member] | Interest Rate Swap [Member] | Palmer of Texas [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative asset | $ 127,981 | $ 31,285 |
Minimum [Member] | Commodity Option [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Derivative, Price Risk Option Strike Price | $ / lb | 3.75 | 3.92 |
Maximum [Member] | Commodity Option [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Derivative, Price Risk Option Strike Price | $ / lb | 4.64 | 4.38 |
Reclassification out of Accumulated Other Comprehensive Income [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax | $ 555,979 |  |
Unrealized gains on available for sale securities, net of tax | 366,346 |  |
Available-for-sale Securities [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax | 14,111 |  |
Unrealized gains on available for sale securities, net of tax | $ 10,864 |  |

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