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SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 USD ($) Segment | Mar. 31, 2018 USD ($) | Dec. 31, 2018 USD ($)
Significant Accounting Policies [Line Items] |  |  |
Marketable securities, weighted average remaining maturity | 3 months 6 days |  |
Restricted cash balances as collateral for corporate credit cards | $ 100,000 | $ 100,000 | $ 100,000
Equipment estimated useful life | 3 years |  |
Impairment of Long-Lived Assets | $ 0 | 0 |
Impairment of goodwill | 0 | 0 |
Revenues from product sales to date | $ 0 |  |
Number of operating segments | Segment | 1 |  |
Right-of-use assets | $ 371,370 |  |
ASC 842 |  |  |
Significant Accounting Policies [Line Items] |  |  |
Operating lease liabilities | 400,000 |  |
Right-of-use assets | 400,000 |  |
In-Process Research and Development |  |  |
Significant Accounting Policies [Line Items] |  |  |
Asset impairment charges | $ 0 | $ 0 |

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