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NATURE OF OPERATIONS AND LIQUIDITY - Additional Information (Details) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2017 USD ($) License | Sep. 30, 2016 USD ($) | Dec. 31, 2016 USD ($)
Nature Of Operations And Liquidity [Line Items] |  |  |
Accumulated deficit | $ (164,543,529) |  | $ (132,858,234)
Net cash provided by operating activities | $ 12,004,509 | $ (16,760,115) |
Development-stage Proprietary Compounds |  |  |
Nature Of Operations And Liquidity [Line Items] |  |  |
Number of licenses acquired | License | 4 |  |

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