INCOME TAXES - Deferred Tax Assets & Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Federal and state income tax credits	$ 59,470	$ 33,837
Net operating loss carryforward	432,471	245,014
Start-up costs capitalized	1,432	1,454
Stock-based compensation	13,696	12,645
Finance lease liabilities	21,455	680
Accrued purchase of intangible asset	7,993	0
Inventory	13,410	0
Research expenditures	57,877	0
Accrued expenses and other	14,106	802
Total deferred tax assets	621,910	294,432
Valuation allowance	(594,661)	(291,222)	$ (162,500)
Deferred tax assets, net of valuation allowance	27,249	3,210
Deferred tax liabilities:
Intangible assets	(505)	(2,116)
Finance lease assets	(8,378)	(666)
Property, plant and equipment, net	(18,381)	(439)
Total deferred tax liabilities	(27,264)	(3,221)
Deferred tax liabilities, net	$ (15)	$ (11)