COLLABORATION AND LICENSING AGREEMENTS - Deferred Revenue (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Current
Beginning balance	$ 7,182
Ending balance	10,829
Non-Current
Beginning balance	8,644
Ending balance	9,613
2017 KKC Agreement
Current
Beginning balance	7,182	$ 4,211
Amounts invoiced as prepayments for product supply	731	816
Decrease for revenue recognized for product supply	(1,328)	(2,333)
Reclassify amounts to be recognized in the next twelve months	4,244	3,265
Ending balance	10,829	5,959
Non-Current
Beginning balance	8,644	9,025
Amounts invoiced as prepayments for product supply	5,213	3,478
Decrease for revenue recognized for product supply	0	0
Reclassify amounts to be recognized in the next twelve months	(4,244)	(3,265)
Ending balance	$ 9,613	$ 9,238