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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Impairment of goodwill | $ 1,275 | $ 1,015 | $ 1,569 | $ 1,015 |
Depreciation expense | 100 | 100 | 100 | 100 |
Amortization expense for intangible assets | 300 | $ 300 | 900 | $ 300 |
Amortization expense, remainder of 2018 | 1,200 |  | 1,200 |  |
Amortization expense, 2019 | 1,000 |  | 1,000 |  |
Amortization expense, 2020 | 1,000 |  | 1,000 |  |
Amortization expense, 2021 | 900 |  | 900 |  |
Amortization expense, 2022 | 900 |  | 900 |  |
Deferred revenue | $ 94 |  | $ 94 |  | $ 66
Securities not included in the computation of diluted net loss per share |  |  | 19,411,045 | 5,919,819 |

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