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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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