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FAIR VALUE OF FINANCIAL INSTRUMENTS (Fair Value of Derivative Instruments) (Details) - USD ($) | Jun. 30, 2018 | Dec. 31, 2017
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Commodity Contracts [Member] | Futures - Commodity Contracts [Member] | Assets [Member] |  |
Fair Value of Financial Instruments [Line Items] |  |
Derivatives not Accounted for as Hedging Instruments | $ (5,130,125) | $ 55,721,680

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- Definition Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as an asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959 + Details
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