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MAJOR CUSTOMERS, PARTNERSHIPS AND STRATEGIC ALLIANCES - Novartis Institutes for BioMedical Research, Inc. (Narrative) (Details) - USD ($) |  | 12 Months Ended
--- | --- | ---
Jul. 27, 2020 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |  |  |  |
Accounts receivable |  | $ 923,000 | $ 3,678,000 |  |
Novartis Institutes for BioMedical Research, Inc. | Collaboration and License Agreement |  |  |  |  |
Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |  |  |  |
Proceeds from collaborators | $ 75,000,000 |  |  |  |
Collaborative arrangement transaction price | 95,100,000 |  |  |  |
Collaborative arrangement, license fee | 75,000,000 |  |  |  |
Collaborative arrangement estimated reimbursable service costs | $ 20,100,000 |  |  |  |
Accounts receivable |  | 0 | 2,200,000 |  |
Deferred revenue |  | 0 | 9,600,000 |  |
Collaboration arrangement, commission fee, portion of gross proceeds, value |  |  |  |  | $ 1,500,000
Collaborative agreement, percent of initial recognition |  |  |  |  | 2.00%
Amortization cost |  | $ 200,000 | $ 600,000 | $ 600,000 |

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