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Financial Instruments, Off-Balance Sheet Risks and Contingencies (Additional Information) (Details) - USD ($)
Sep. 30, 2015
Dec. 31, 2014
Carrying Amounts and Fair Values of Financial Instruments or Liabilities [Line Items]    
Cash investments in money market funds $ 13,000,000 $ 24,000,000
Deposits in domestic and foreign financial institutions $ 70,719,886 $ 29,250,024