INCOME TAXES - Net Operating Loss Carryforwards (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)
U.S. federal
Operating Loss Carryforwards
Net operating loss carryforwards	$ 245,242
Tax credit carryforwards	16,336
Operating loss carryforward, indefinite	245,242
State
Operating Loss Carryforwards
Net operating loss carryforwards	189,831
Danish
Operating Loss Carryforwards
Net operating loss carryforwards	$ 21,628