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RESTRUCTURING CHARGES - Narrative (Details) $ in Thousands		3 Months Ended		6 Months Ended
	Apr. 26, 2023 employee	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)
Restructuring Cost and Reserve [Line Items]
Number of employees eliminated in restructuring | employee	110
Percentage of positions eliminated in restructuring	23.00%
Restructuring charges | $		$ 5,300		$ 5,337
Full-Time Employees
Restructuring Cost and Reserve [Line Items]
Number of employees eliminated in restructuring | employee	55
Contracted Employees
Restructuring Cost and Reserve [Line Items]
Number of employees eliminated in restructuring | employee	55
Research and development
Restructuring Cost and Reserve [Line Items]
Restructuring charges | $			$ 4,100		$ 4,100
General and administrative
Restructuring Cost and Reserve [Line Items]
Restructuring charges | $			$ 1,200		$ 1,200

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The number of positions eliminated during the period as a result of restructuring activities.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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