FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 2) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Derivatives not Accounted for as Hedging Instruments | Futures - Commodity Contracts | ||
| Location of Gain (Loss) on Derivatives Recognized in Income | Change in unrealized gain (loss) on open positions | ||
| Realized Gain (Loss) on Derivatives Recognized in Income | $ 27,857,540 | $ (41,811,240) | $ (19,750,710) |
| Change in Unrealized Gain (Loss) on Derivatives Recognized in Income | $ 9,775,220 | $ (1,095,250) | $ (6,375,760) |
| Commodity Contract [Member] | |||
| Location of Gain (Loss) on Derivatives Recognized in Income | Realized gain (loss) on closed positions | ||