RELATED PARTY TRANSACTIONS (Details) $ in Thousands		1 Months Ended	12 Months Ended
	Sep. 03, 2025 USD ($) member shares	Jul. 31, 2025 building	Dec. 31, 2025 USD ($) shares	Dec. 31, 2024 USD ($) shares		Dec. 31, 2023 USD ($)	Sep. 26, 2025 shares
Related Party Transaction [Line Items]
Number of buildings in leaseback | building		2
Proceeds from sale-leaseback transaction | $			$ 32,658	$ 0		$ 0
Sale-leaseback term		29 years
Issuance of common stock (in shares)			1,548,168	612,592
Issuance of stock | $			$ 5,942	$ 1,652		723
Loss on issuance of convertible preferred stock | $			$ 379,619	$ 0		$ 0
Warrants issued to purchase common stock (in shares)							2,552,467
Series C
Related Party Transaction [Line Items]
Issuance of common stock (in shares)			8,384,459	18,060,773	[1]
Issuance of stock | $			$ 206,241	$ 313,117
Series C-1
Related Party Transaction [Line Items]
Issuance of common stock (in shares)			25,412,440
Issuance of stock | $				$ 781,900
Related Party | Series C
Related Party Transaction [Line Items]
Issuance of common stock (in shares)			5,397,160	6,641,966
Related Party | Series C-1
Related Party Transaction [Line Items]
Issuance of common stock (in shares)			2,535,250
Related Party | GE Aerospace
Related Party Transaction [Line Items]
Issuance of stock | $	$ 300,000
Loss on issuance of convertible preferred stock | $			$ 215,585
Number of board members added | member	1
Warrants issued to purchase common stock (in shares)							2,552,467
Related Party | GE Aerospace | Series C-1
Related Party Transaction [Line Items]
Issuance of common stock (in shares)	16,723,599

[1] Share amounts have been adjusted to reflect the 6.3811681-for-1 forward stock split that became effective on November 3, 2025 in connection with the initial public offering (see Note 1).