INCOME TAXES - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Operating Loss Carryforwards [Line Items]
Provision for income taxes	$ 1	$ 1
Increase of valuation allowance	10,800	7,700
Federal net operating loss carryforwards	159,400
State net operating loss carryforwards	162,100
Tax cuts and jobs act of 2017, federal net operating loss carryforwards	$ 112,500
Percentage of tax cuts and jobs act of 2017, federal net operating loss carryforwards	80.00%
Operating loss carryforwards that will expire	$ 0
Interest
Penalties	0	0
Unrecognized tax benefits	0	0
Significant uncertain tax positions	1,200	$ 1,000
Switzerland
Operating Loss Carryforwards [Line Items]
Foreign net operating loss carryforwards	$ 52