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NATURE OF BUSINESS (Details 2) - USD ($) $ in Thousands |  | 1 Months Ended | 9 Months Ended
--- | --- | --- | ---
Mar. 06, 2015 | Mar. 31, 2015 | Sep. 30, 2015
Preferred stock |  |  |
Principal amount converted |  |  | $ 5,000
6.0% Convertible promissory notes |  |  |
Preferred stock |  |  |
Principal amount converted |  | $ 5,000 |
Series D convertible redeemable preferred stock |  |  |
Preferred stock |  |  |
Cash consideration from issuance of preferred stock |  | $ 45,000 |
Subsequent events | Private Placement | Investors | Series D convertible redeemable preferred stock |  |  |
Preferred stock |  |  |
Aggregate consideration | $ 50,000 |  |
Cash consideration from issuance of preferred stock | 45,000 |  |
Subsequent events | Conversion of convertible notes into convertible preferred stock | Investors | 6.0% Convertible promissory notes |  |  |
Preferred stock |  |  |
Principal amount converted | $ 5,000 |  |

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