Cash Management Agreement with Affiliate (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Related Party Transactions [Abstract]
Management Fee, Description			RJOIM is paid an annual fee, currently 0.20%, calculated and accrued daily at a rate equal to 1/360 of the principal balance of the Trust's deposits held by RJOIM.
Cash and Cash Equivalents, at Carrying Value	$ 3,763,722		$ 3,763,722		$ 8,659,507
Financial Instruments, Owned, Principal Investments, at Fair Value	11,775,841		11,775,841
Noninterest Expense Investment Advisory Fees	$ 8,513	$ 11,546	$ 17,437	$ 26,865