Summary of Significant Accounting Policies - Summary of Gross and Net Amounts of Offsetting Assets (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Offsetting [Abstract]
Gross Amount of Recognized Assets	$ 21,389,878	$ 13,418,884
Gross Amounts Offset in the Statement of Financial Condition	(139,670)	(64,085)
Net Amounts of Assets Presented in the Statement of Financial Condition	21,250,208	13,354,799
Gross Amounts Not Offset in the Statement of Financial Condition - Financial Instruments	0
Gross Amounts Not Offset in the Statement of Financial Condition - Cash Collateral Pledged	0
Gross Amounts Not Offset in the Statement of Financial Condition - Cash Collateral Pledged
Net Amount	$ 21,250,208	$ 13,354,799