v3.26.1
SEGMENT REPORTING - Schedule of Revenue, Significant Segment Expenses (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting [Line Items]        
Revenue $ 17,369 $ 8,512 $ 39,248 $ 17,046
Cost of revenue 11,993 5,996 29,084 9,654
Gross profit 5,376 2,516 10,164 7,392
Stock-based compensation     11,419 18,260
Depreciation, amortization, and accretion (excluding amounts included in cost of revenue) 1,919 473 4,142 778
Interest expense 4,192 2,516 7,658 2,611
Interest income (704) (312) (1,272) (627)
Provision for income taxes 855 2,073 856 2,456
Net loss attributable to Energy Vault Holdings, Inc. (29,692) (34,927) (62,177) (56,063)
Cost of revenue depreciation and amortization 1,300   2,600  
Reportable Segment        
Segment Reporting [Line Items]        
Revenue 17,369 8,512 39,248 17,046
Cost of revenue 11,993 5,996 29,084 9,654
Gross profit 5,376 2,516 10,164 7,392
Non-personnel operating costs 13,509 7,573 23,455 14,860
Salaries and wages 10,189 8,629 19,931 17,541
Stock-based compensation 4,366 8,984 11,419 18,260
Depreciation, amortization, and accretion (excluding amounts included in cost of revenue) 1,919 473 4,142 778
Interest expense 4,192 2,516 7,658 2,611
Interest income (704) (312) (1,272) (627)
Provision for income taxes 855 2,073 856 2,456
Other segment items 742 7,512 6,152 7,619
Net loss attributable to Energy Vault Holdings, Inc. $ (29,692) $ (34,932) $ (62,177) $ (56,106)