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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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