FAIR VALUE MEASUREMENTS (Details) - USD ($) | 9 Months Ended | |
Sep. 30, 2017 | Dec. 31, 2016 |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | $ 77,976,481 | $ 77,529,350 |
Noncash or Part Noncash Acquisition, Interest Acquired | 15.00% | |
Cash and Equivalents | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | $ 25,882,554 | 15,822,495 |
U.S. Government Securities | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 36,184,904 | 36,091,261 |
Corporate Debt | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 7,652,455 | 7,557,029 |
Certificates of Deposit | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 7,617,551 | 17,727,111 |
GCS Holdings | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 365,017 | 331,454 |
Warrant [Member] | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 274,000 | |
Level 1 | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 33,171,162 | 23,298,716 |
Level 1 | Cash and Equivalents | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 25,882,554 | 15,822,495 |
Level 1 | U.S. Government Securities | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 6,923,591 | 7,144,767 |
Level 1 | GCS Holdings | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 365,017 | 331,454 |
Level 1 | Warrant [Member] | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 0 | |
Level 2 | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 44,531,319 | 54,230,634 |
Level 2 | U.S. Government Securities | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 29,261,313 | 28,946,494 |
Level 2 | Corporate Debt | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 7,652,455 | 7,557,029 |
Level 2 | Certificates of Deposit | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 7,617,551 | 17,727,111 |
Level 2 | GCS Holdings | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 0 | |
Level 2 | Warrant [Member] | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 0 | |
Level 3 | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 274,000 | 0 |
Level 3 | Cash and Equivalents | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 0 | 0 |
Level 3 | U.S. Government Securities | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 0 | 0 |
Level 3 | Corporate Debt | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 0 | 0 |
Level 3 | Certificates of Deposit | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 0 | 0 |
Level 3 | GCS Holdings | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 0 | $ 0 |
Level 3 | Warrant [Member] | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | $ 274,000 | |