Quarterly report pursuant to Section 13 or 15(d)

REVERSE RECAPITALIZATION - Schedule of Reverse Recapitalization (Details)

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REVERSE RECAPITALIZATION - Schedule of Reverse Recapitalization (Details) - shares
9 Months Ended
Feb. 11, 2022
Sep. 30, 2022
Aug. 01, 2022
Jun. 30, 2022
Dec. 31, 2021
Business Acquisition [Line Items]          
Common stock outstanding (in shares) 133,633,000 137,839,000     20,432,000
Shares issued (in shares) 19,500,000        
Warrants outstanding (in shares) 14,700,000 5,167,000   14,067,000 14,750,000
Warrants issued (in shares) 14,700,000        
Common Stock          
Business Acquisition [Line Items]          
Shares issued (in shares) [1]   27,553,000      
Number of earn-out shares (in shares) 9,000,000 9,000,000      
Public Warrants          
Business Acquisition [Line Items]          
Warrants outstanding (in shares) 9,600,000 0 200,000 8,900,000 9,583,000
Warrants issued (in shares) 9,600,000        
Private warrants          
Business Acquisition [Line Items]          
Warrants outstanding (in shares) 5,200,000 5,167,000   5,167,000 5,167,000
Warrants issued (in shares) 5,200,000        
Novus | Public Warrants          
Business Acquisition [Line Items]          
Warrants outstanding (in shares) 9,600,000        
Novus | Private warrants          
Business Acquisition [Line Items]          
Warrants outstanding (in shares) 5,200,000        
Novus | Public Shares          
Business Acquisition [Line Items]          
Shares issued (in shares) 4,079,000        
Novus | Sponsor Shares          
Business Acquisition [Line Items]          
Shares issued (in shares) 3,975,000        
Common shares that have transfer restrictions based on certain thresholds (in shares) 1,600,000        
Legacy Energy Vault          
Business Acquisition [Line Items]          
Common stock outstanding (in shares) 106,079,000        
[1] The number of shares of convertible preferred stock and common stock prior to the Merger (defined in Note 1) have been retroactively restated to reflect the exchange ratio of 6.7735 established in the Merger as described in Note 1 and Note 3.