DERIVATIVE INSTRUMENTS HEDGING AND NON-HEDGING ACTIVITIES (Details)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Derivatives, Fair Value [Line Items]
Derivative Asset, Number of Instruments Held	10,501	6,278
Derivative Liability, Number of Instruments Held	0	0
Derivative Assets, Fair value	$ 8,053,813	$ 2,558,350
Derivative Liabilities, Fair value	0	0
Derivative Assets, Notional Amount	10,501,000,000	5,945,000,000
Derivative Liabilities, Notional Amount	$ 0	$ 0
Eurodollar Futures [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Number of Instruments Held	10,501	5,908
Derivative Liability, Number of Instruments Held	0	0
Derivative Assets, Fair value	$ 8,053,813	$ 2,425,538
Derivative Liabilities, Fair value	0	0
Derivative Assets, Notional Amount	10,501,000,000	5,908,000,000
Derivative Liabilities, Notional Amount	$ 0	$ 0
Deliverable Swap Futures [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Number of Instruments Held		70
Derivative Liability, Number of Instruments Held		0
Derivative Assets, Fair value		$ 27,343
Derivative Liabilities, Fair value		0
Derivative Assets, Notional Amount		7,000,000
Derivative Liabilities, Notional Amount		$ 0
Treasury Note Futures [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Number of Instruments Held		300
Derivative Liability, Number of Instruments Held		0
Derivative Assets, Fair value		$ 105,469
Derivative Liabilities, Fair value		0
Derivative Assets, Notional Amount		30,000,000
Derivative Liabilities, Notional Amount		$ 0