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BALANCE SHEETS COMPONENTS - Schedule of Construction in Progress (Details) $ in Thousands, ر.س in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2026 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2023 SAR (ر.س)
Property, Plant and Equipment [Line Items]
Total construction in progress	$ 1,167,579	$ 970,960
MISA \| Government Grant \| Related Party
Property, Plant and Equipment [Line Items]
Related party transaction, amount of transaction			$ 97,500	ر.س 366
Machinery and tooling
Property, Plant and Equipment [Line Items]
Total construction in progress	501,574	418,426
Asset under Construction
Property, Plant and Equipment [Line Items]
Total construction in progress	622,562	512,502
AMP-2 Construction In Progress Balance \| MISA \| Government Grant \| Related Party
Property, Plant and Equipment [Line Items]
Related party transaction, amount of transaction	67,300	67,300
Leasehold improvements and other
Property, Plant and Equipment [Line Items]
Total construction in progress	$ 43,443	$ 40,032