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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jan. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Jun. 30, 2022 USD ($) | Dec. 31, 2021 USD ($) | Sep. 30, 2021 USD ($) | Dec. 31, 2022 USD ($) unit | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Sep. 30, 2022 USD ($)
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Insurance coverage limit |  |  |  |  |  | $ 250,000 |  |  |
Intangibles impairment charge |  |  |  |  | $ 31,700,000 | $ 27,764,000 | $ 31,700,000 | $ 0 |
Number of reporting units | unit |  |  |  |  |  | 1 |  |  |
Goodwill |  | $ 13,064,000 | $ 13,100,000 | $ 13,064,000 |  | $ 0 | 13,064,000 |  |
Goodwill impairment |  |  |  |  |  |  | $ 0 |  |
License agreement, royalty rate |  |  | 2.00% |  |  | 2.00% |  |  |
Contingent consideration liability, measurement input |  | 0.080 |  | 0.080 |  |  | 0.080 |  |
Business combination, contingent consideration, liability |  |  | $ 1,800,000 |  |  | $ 0 |  |  | $ 0
Dividend yield |  |  |  |  |  | 0.00% |  |  |
License and related revenue |  |  |  |  |  | $ 40,000,000 | $ 26,544,000 | $ 11,236,000 |
Discount Rate |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Weighted-average cost of capital |  | 9.30% |  | 9.30% |  |  | 9.30% |  |
Roche |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Proceeds from milestone achieved | $ 20,000,000 |  |  |  |  |  |  |  |
Performance-Based Awards |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Award vesting period |  |  |  |  |  | 4 years |  |  |
Expected term (in years) |  |  |  |  |  | 10 years |  |  |
IPR&D intangible assets: |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Total Intangibles |  | $ 14,700,000 |  | $ 14,700,000 |  | $ 0 | $ 14,700,000 |  |
Licensing Agreements | Roche |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Milestone payment |  | $ 20,000,000 |  |  |  |  |  |  |
Milestone payment term |  | 30 days |  |  |  |  |  |  |
Vicinium | Europe | IPR&D intangible assets: |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Intangibles impairment charge |  |  | 14,700,000 |  |  |  |  |  |
Total Intangibles |  | $ 14,700,000 | $ 0 | 14,700,000 |  | $ 0 | $ 14,700,000 |  |
EBI-031 | Roche |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
License and related revenue |  |  |  | $ 20,000,000 |  |  |  |  |
Proceeds from milestone achieved | $ 20,000,000 |  |  |  |  |  |  |  |
Lab equipment |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Estimated useful life |  |  |  |  |  | 5 years |  |  |
Furniture and fixtures |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Estimated useful life |  |  |  |  |  | 4 years |  |  |
Computer equipment |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Estimated useful life |  |  |  |  |  | 3 years |  |  |
Leasehold improvements |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Estimated useful life |  |  |  |  |  | 5 years |  |  |

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