COMMITMENTS AND CONTINGENCIES - Narrative (Details) $ in Millions			3 Months Ended			6 Months Ended		12 Months Ended
	Feb. 10, 2021	Mar. 11, 2020	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 22, 2022 USD ($) quarterly_payment
Commitments And Contingencies [Line Items]
Contract cost incurred in research and development activities						$ 46.7
Supply Agreement, Patheon Inc.
Commitments And Contingencies [Line Items]
Purchase commitment, option for non-auto renewal, prior written notice period		18 months
Minimum purchase commitment			$ 0.0			0.0
Siegfried Evionnaz SA
Commitments And Contingencies [Line Items]
Cost of purchased minimum quantity product			21.4			21.4
Long-term minimum purchase commitment						3.6		$ 1.5
STA Pharmaceutical Hong Kong Limited
Commitments And Contingencies [Line Items]
Long-term minimum purchase commitment						11.1
WuXi STA
Commitments And Contingencies [Line Items]
Purchase commitment, option to extend, prior notice period	18 months
Long-term purchase commitment, option to terminate, prior notice period (at least)	180 days
BioVectra Inc
Commitments And Contingencies [Line Items]
Long-term purchase commitment, termination amount payable										$ 32.5
Long-term purchase commitment, upfront payment termination amount					$ 17.5
Long-term purchase commitment, termination amount payable after upfront payment, number of quarterly periods | quarterly_payment										6
Long-term purchase commitment, termination amount payable after upfront payment, per quarter										$ 2.5
Long-term purchase commitment, termination amount payable after upfront payment										$ 15.0
Long-term purchase commitment, imputed interest on termination amount payable										17.00%
Long-term purchase commitment, upfront termination amount classified as cost of goods sold									$ 11.2
Amortization discount			0.4	$ 0.5		1.0	$ 0.9
Panion & BF Biotech, Inc | License Agreement
Commitments And Contingencies [Line Items]
Royalty payments			$ 2.5	$ 3.2		$ 4.3	$ 6.0