SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Accrued Expenses (Details) - USD ($) |
Sep. 30, 2018 |
Dec. 31, 2017 |
|---|---|---|
| Accounting Policies [Abstract] | ||
| Compensation and benefits | $ 0 | $ 1,065,225 |
| Clinical costs | 138,000 | 0 |
| Other | 91,401 | 115,000 |
| Total | $ 229,401 | $ 1,180,225 |