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EQUITY - Additional Information (Details) (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 3 Months Ended
--- | --- | --- | ---
Nov. 06, 2017 | Jul. 25, 2017 | Dec. 31, 2017
Class of Warrant or Right [Line Items] |  |  |
Issuance of common stock as merger consideration (in shares) | 3,423,367 |  |
Issuance of common stock as merger consideration | $ 23,300 |  | $ 23,279
Public Offering |  |  |
Class of Warrant or Right [Line Items] |  |  |
Issuance of common stock in relation to public offering, net of offering costs incurred (in shares) |  | 9,583,332 |
Public offering price (in usd per share) |  | $ 4.50 |
Gross proceeds |  | $ 43,100 |
Underwriting |  |  |
Class of Warrant or Right [Line Items] |  |  |
Options to purchase additional shares (in shares) |  | 1,249,999 |

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