FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES (Additional Information) (Details) - USD ($) |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Carrying Amounts and Fair Values of Financial Instruments or Liabilities [Line Items] | ||
| Cash investments in money market funds | $ 37,000,000 | $ 7,000,000 |
| Deposits in domestic and foreign financial institutions | $ 87,370,598 | $ 83,701,240 |