DERIVATIVE INSTRUMENTS HEDGING AND NON-HEDGING ACTIVITIES - Gains and Losses on Derivative Contracts (Details)	3 Months Ended
	Mar. 31, 2018 USD ($)
Interest rate:
Amount of realized gain (loss)	$ 2,792,794
Amount of unrealized appreciation (depreciation)	12,783,088
Total	15,575,882
Futures
Interest rate:
Amount of realized gain (loss)	2,792,794
Amount of unrealized appreciation (depreciation)	12,783,088
Total	$ 15,575,882