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Investments (Details 1) - Interest Rate Risk [Member] - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Mar. 31, 2015
Mar. 31, 2016
Mar. 31, 2016
Location of Gain(Loss) on Derivatives Net realized gain (loss) on futures and options contracts and/or Change in unrealized gain (loss) on futures and options contracts Net realized gain (loss) on futures and options contracts and/or Change in unrealized gain (loss) on futures and options contracts Net realized gain (loss) on futures and options contracts and/or Change in unrealized gain (loss) on futures and options contracts
Realized Gain (Loss) on Derivatives Recognized in Income $ (11,396) $ (719,469) $ (726,684)
Change in Unrealized gain (loss) on Derivatives Recognized in Income $ (156,031) $ (250,645) $ (127,903)