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Fair Value of Financial Instruments - Narrative (Details) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2018 USD ($) financial_instrument | Jun. 30, 2018 USD ($) financial_instrument | Jun. 30, 2017 USD ($) | Dec. 31, 2017 USD ($) lb $ / lb
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Gain on investment in equity securities | $ 59,112 | $ (29,185) | $ 0 |
Fair value of equity securities | $ 845,000 | $ 845,000 |  | $ 537,233
Derivative asset, number of instruments held | financial_instrument | 1 | 1 |  |
Commodity Option | Level 2 Inputs |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative asset, fair value, gross asset |  |  |  | $ 9,027
Notional quantities of contracts in place | lb |  |  |  | 1,351,494
Term Loan | Interest Rate Swap | Level 2 Inputs |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Variable rate basis on interest rate swap |  | LIBOR |  |
Term Loan | Palmer of Texas | Interest Rate Swap | Level 2 Inputs |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative asset, fair value, gross asset | $ 220,440 | $ 220,440 |  | $ 127,981
Minimum | Commodity Option | Level 2 Inputs |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative strike price (in usd per lb) | $ / lb |  |  |  | 3.75
Maximum | Commodity Option | Level 2 Inputs |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative strike price (in usd per lb) | $ / lb |  |  |  | 4.64

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- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=109247956&loc=SL51823488-111719 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959 + Details
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