SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Schedule of Cash and Cash Equivalents

The following table provides a reconciliation of cash, cash equivalents, and restricted cash to amounts shown in the statements of cash flows (in thousands):

	December 31,
	2023		2022		2021
Cash and cash equivalents	$	1,369,947	$	1,735,765	$	6,262,905
Restricted cash included in other current assets	1,560		1,555		10,740
Restricted cash included in other noncurrent assets	—		—		24,375
Total cash, cash equivalents, and restricted cash	$	1,371,507	$	1,737,320	$	6,298,020

Schedule of Restricted Cash

The following table provides a reconciliation of cash, cash equivalents, and restricted cash to amounts shown in the statements of cash flows (in thousands):

	December 31,
	2023		2022		2021
Cash and cash equivalents	$	1,369,947	$	1,735,765	$	6,262,905
Restricted cash included in other current assets	1,560		1,555		10,740
Restricted cash included in other noncurrent assets	—		—		24,375
Total cash, cash equivalents, and restricted cash	$	1,371,507	$	1,737,320	$	6,298,020

Schedule of Property, Plant and Equipment, Net

The Company generally uses the following estimated useful lives for each asset category:

Asset Category	Life (years)
Machinery, tooling and vehicles	3 - 7
Computer equipment and software	3
Furniture and fixtures	5
Finance leases	Shorter of the lease term or the estimated useful lives of the assets
Building and improvements	15 - 40
Leasehold improvements	Shorter of remaining lease term or the estimated useful lives of the assets

Property, plant and equipment, net as of December 31, 2023 and 2022 was as follows (in thousands):

	December 31, 2023		December 31, 2022
Land and land improvements	$	69,718	$	64,677
Building and improvements(1)	576,097		197,406
Machinery, tooling and vehicles(2)	1,045,485		743,006
Computer equipment and software	74,336		48,899
Leasehold improvements	221,619		182,904
Furniture and fixtures	45,315		27,803
Finance leases	94,285		97,992
Construction in progress	1,185,413		1,077,179
Total Property, plant and equipment	3,312,268		2,439,866
Less accumulated depreciation and amortization	(501,401)		(273,090)
Property, plant and equipment, net	$	2,810,867	$	2,166,776

(1) As of December 31, 2023, $120.2 million of capital expenditure support received from Ministry of Investment of Saudi Arabia (“MISA”) was primarily recorded as a deduction to the AMP-2 building balance. See Note 20 “Related Party Transactions” for more information.

(2) Included $32.5 million of service loaner vehicles as of December 31, 2023.

Construction in progress consisted of the following (in thousands):

	December 31, 2023		December 31, 2022
Machinery and tooling	$	728,751	$	515,662
Construction of AMP-1 and AMP-2(1)	430,878		526,720
Leasehold improvements	25,784		34,797
Total construction in progress	$	1,185,413	$	1,077,179

(1) As of December 31, 2023 and 2022, $12.1 million and $33.3 million, of capital expenditure support received from MISA was recorded primarily as a deduction to the AMP-2 facility construction in progress balance, respectively. See Note 2 “Summary of Significant Accounting Policies” and Note 20 “Related Party Transactions” for more information.