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INTANGIBLE ASSETS AND GOODWILL (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Goodwill | $ 13,064 |  | $ 13,064 |  | $ 13,064
Intangibles impairment charge | $ 31,700 | $ 0 | $ 31,700 | $ 0 |
Percentage of fair value in excess of carrying amount | 45.00% |  | 45.00% |  |
Minimum |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Percentage of fair value in excess of carrying amount | 45.00% |  | 45.00% |  |
Maximum |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Percentage of fair value in excess of carrying amount | 55.00% |  | 55.00% |  |
Vicinium | IPR&D intangible assets |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Total Intangibles | $ 14,700 |  | $ 14,700 |  | 46,400
Vicinium | IPR&D intangible assets | United States |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Total Intangibles | 0 |  | 0 |  | 31,700
Intangibles impairment charge | 31,700 |  |  |  |
Vicinium | IPR&D intangible assets | Europe |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Total Intangibles | $ 14,700 |  | $ 14,700 |  | $ 14,700

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