INCOME TAXES - Net deferred tax assets and liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred income tax asset:
Net operating loss carry forward	$ 225,904	$ 203,298
Stock-based compensation	24,920	18,319
Tax credit carryforwards	46,957	40,851
Lease liabilities	18,017	14,970
Capitalized R&D	47,755	0
Depreciation and Amortization	0	228
Reserves and accruals	3,997	4,445
Deferred tax assets before valuation allowance	367,550	282,111
Less: valuation allowance	(350,418)	(267,469)
Net deferred income tax assets	17,132	14,642
Deferred tax liabilities:
Depreciation and amortization	(17,132)	(14,642)
Net deferred tax assets (liabilities)	$ 0	$ 0