INCOME TAXES - Schedule of Company's Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Net operating loss carryforwards	$ 174,129	$ 159,740
Research and development tax credit carryforwards	44,264	35,260
Stock-based compensation	7,695	6,691
Deferred revenue	38,700	61,114
Capitalized research	37,985	0
Fixed assets	10,087	10,130
Lease liability	10,074	11,279
Accruals and reserves	1,603	1,119
Other	283	106
Total deferred tax asset	324,820	285,439
Valuation allowance	301,840	259,820
Deferred tax assets	22,980	25,619
Liabilities:
Intangible assets	(13,512)	(13,856)
Operating lease right-of-use assets	(14,620)	(17,348)
Deferred tax liabilities	(28,132)	(31,204)
Total net deferred tax liabilities	$ (5,152)	$ (5,585)