COMMERCIALIZATION AGREEMENTS (Details) - USD ($) $ in Millions	Jul. 23, 2018	Oct. 19, 2017	Dec. 31, 2024
Chiesi US Agreement
Non-refundable payment receivable	$ 25.0
Additional amounts payable to cover development costs	20.0
Maximum entitlement of development costs to cover per year	7.5
Additional amount payable for achievement of regulatory and commercial milestones	$ 760.0		$ 735.0
Chiesi US Agreement | Maximum
Payment on net sales percentage	40.00%
Chiesi US Agreement | Minimum
Payment on net sales percentage	15.00%
Chiesi Ex-US Agreement
Non-refundable payment receivable		$ 25.0
Additional amounts payable to cover development costs		25.0
Maximum entitlement of development costs to cover per year		10.0
Additional amount payable for achievement of regulatory and commercial milestones		$ 320.0
Chiesi Ex-US Agreement | Maximum
Payment on net sales percentage		35.00%
Chiesi Ex-US Agreement | Minimum
Payment on net sales percentage		15.00%