MAJOR CUSTOMERS, PARTNERSHIPS AND STRATEGIC ALLIANCES - California Institute for Regenerative Medicine (Details) - USD ($)	1 Months Ended		12 Months Ended
	Nov. 30, 2021	May 31, 2018	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Revenues			$ 111,299,000	$ 110,701,000	$ 118,192,000
Other non-current liabilities			1,207,000	1,217,000
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