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MAJOR CUSTOMERS, PARTNERSHIPS AND STRATEGIC ALLIANCES - California Institute for Regenerative Medicine (Narrative) (Details) - USD ($) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Nov. 30, 2021 | May 31, 2018 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |  |  |  |  |
Revenues |  |  | $ 176,232,000 | $ 111,299,000 | $ 110,701,000 |
Other non-current liabilities |  |  | 1,187,000 | 1,207,000 |  |
California Institute for Regenerative Medicine ("CIRM") |  |  |  |  |  |
Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |  |  |  |  |
Funds due under the agreement |  | $ 8,000,000 |  |  |  |
Other non-current liabilities |  |  | $ 0 | $ 0 |  | $ 6,400,000
Accrued interest |  |  |  |  |  | 1,200,000
California Institute for Regenerative Medicine ("CIRM") | Research grants |  |  |  |  |  |
Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |  |  |  |  |
Revenues | $ 5,200,000 |  |  |  |  | $ 5,200,000
Accrued interest | $ 1,200,000 |  |  |  |  |

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