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Condensed Consolidated Statements of Shareholders’ Equity and Non-Controlling Interest (Unaudited) - USD ($)
$ in Thousands
Total
Class A Common Stock
Class A Common Stock
RONI
Class A Common Stock
NET Power, Inc.
Class B Common Stock
Total Shareholders' Equity
Total Shareholders' Equity
NET Power, Inc.
Total Shareholders' Equity
NET Power, LLC.
Common Stock
Class A Common Stock
Common Stock
Class A Common Stock
NET Power, Inc.
Common Stock
Class B Common Stock
Common Stock
Class B Common Stock
NET Power, Inc.
Common Stock
Class B Common Stock
NET Power, LLC.
Common Stock
Class A Ordinary Shares
Common Stock
Class A Ordinary Shares
NET Power, Inc.
Common Stock
Class B Ordinary Shares
Common Stock
Class B Ordinary Shares
NET Power, Inc.
Additional Paid-in Capital
Additional Paid-in Capital
NET Power, Inc.
Additional Paid-in Capital
NET Power, LLC.
Accumulated Other Comprehensive Income (Loss)
Accumulated Deficit
Accumulated Deficit
NET Power, LLC.
Non-controlling Interests - Mezzanine Equity
Non-controlling Interests - Mezzanine Equity
NET Power, Inc.
Non-controlling Interests - Mezzanine Equity
NET Power, LLC.
Common stock, beginning balance (in shares) at Jun. 08, 2023                 0   0     2,500   8,625,000                    
Equity, beginning balance at Jun. 08, 2023           $ (98,966)     $ 0   $ 0     $ 0   $ 1   $ 0     $ 0 $ (98,966)   $ 0    
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                                    
Sponsor forfeiture of RONI Class B ordinary shares and reservation of earnout shares (in shares)                               (1,986,775)                    
Stock issued during period, shares, conversion of convertible securities (in shares)                   13,307,276   6,638,225 127,716,730   (2,500)   (6,638,225)                  
Stock issued during period, value, conversion of convertible securities             $ 60,047 $ 75,711   $ 1   $ 1 $ 12       $ (1)   $ 60,045 $ (12)     $ 75,711   $ 87,094 $ 1,676,618
Foreign currency translation gain           1                             1          
Amortization of share-based payments                                               752    
Adjustment of redeemable non-controlling interest to redemption value           (86,801)                       (86,801)           86,801    
Net loss           (35,001)                               (35,001)   (75,585)    
Issuance of RONI Class A Common Stock to PIPE Investors (in shares)                 54,044,995                                  
Issuance of RONI Class A Common Stock to PIPE Investors           540,451     $ 6                 540,445                
Stock issued during period, shares, acquisitions (in shares)                     8,356,635                              
Equity awards vested due to Business Combination           1         $ 1             542       (542)   109,639    
Common stock, ending balance (in shares) at Jun. 30, 2023                 67,352,271   142,711,590     0   0                    
Equity, ending balance at Jun. 30, 2023           455,443     $ 7   $ 14     $ 0   $ 0   514,219     1 (58,798)   1,885,319    
Temporary equity, beginning balance at Jun. 08, 2023 $ 356,318 $ 356,318                                                
Temporary equity, beginning balance (in shares) at Jun. 08, 2023   34,500,000                                                
Increase (Decrease) in Temporary Equity [Roll Forward]                                                    
Redemption of Class A ordinary shares by RONI public shareholders (shares)     (21,195,224)                                              
Temporary equity, conversion of RONI Class A and Class B ordinary shares into NET Power, Inc. Class A and Class B Common Stock, respectively (in shares)       (13,304,776)                                            
Temporary equity, ending balance (in shares) at Jun. 30, 2023   0                                                
Temporary equity, ending balance at Jun. 30, 2023 1,885,319 $ 0                                                
Common stock, beginning balance (in shares) at Dec. 31, 2023   71,277,906     141,787,429       71,277,906   141,787,429                              
Equity, beginning balance at Dec. 31, 2023 785,009         785,009     $ 7   $ 14             851,841     0 (66,853)   1,545,905    
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                                    
Redemption of Class A Common Stock (in shares)                 679,559   679,559                              
Redemption of Class B Common Stock           74                       74           (74)    
Issuance of Class A Common Stock (in shares)                 12,587                                  
Issuance of Class A Common Stock           4,032                       4,032           (4,005)    
Tax Receivable Agreement, net of deferred taxes           (567)                       (567)                
Unrealized gain (loss) on investments           224                             224     438    
Amortization of share based payments (in shares)                     693,941                              
Amortization of share-based payments           647                       647           5,622    
Adjustment of redeemable non-controlling interest to redemption value           (118,225)                       (118,225)           118,225    
Net loss           (11,421)                               (11,421)   (30,211)    
Common stock, ending balance (in shares) at Mar. 31, 2024                 71,970,052   141,801,811                              
Equity, ending balance at Mar. 31, 2024           659,773     $ 7   $ 14             737,802     224 (78,274)   1,635,900    
Common stock, beginning balance (in shares) at Dec. 31, 2023   71,277,906     141,787,429       71,277,906   141,787,429                              
Equity, beginning balance at Dec. 31, 2023 785,009         785,009     $ 7   $ 14             851,841     0 (66,853)   1,545,905    
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                                    
Unrealized gain (loss) on investments (198)                                                  
Foreign currency translation gain 0                                                  
Net loss (58,849)                                                  
Common stock, ending balance (in shares) at Jun. 30, 2024   72,584,336     141,840,604       72,584,336   141,840,604                              
Equity, ending balance at Jun. 30, 2024 730,495         730,495     $ 7   $ 14             813,083     (67) (82,542)   1,510,864    
Common stock, beginning balance (in shares) at Mar. 31, 2024                 71,970,052   141,801,811                              
Equity, beginning balance at Mar. 31, 2024           659,773     $ 7   $ 14             737,802     224 (78,274)   1,635,900    
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                                    
Redemption of Class A Common Stock (in shares)                 611,455   611,455                              
Redemption of Class B Common Stock           708                       708           (708)    
Issuance of Class A Common Stock (in shares)                 2,129                                  
Issuance of Class A Common Stock           29                       29           (3)    
Exercise of Warrants (in shares)                 700                                  
Exercise of Warrants           10                       10                
Tax Receivable Agreement, net of deferred taxes           674                       674                
Unrealized gain (loss) on investments (860)         (291)                             (291)     (568)    
Foreign currency translation gain 0                                                  
Amortization of share based payments (in shares)                     650,248                              
Amortization of share-based payments           1,114                       1,114           7,417    
Adjustment of redeemable non-controlling interest to redemption value           72,746                       72,746           (118,225)    
Net loss (17,217)         (4,268)                               (4,268)   (12,949)    
Common stock, ending balance (in shares) at Jun. 30, 2024   72,584,336     141,840,604       72,584,336   141,840,604                              
Equity, ending balance at Jun. 30, 2024 $ 730,495         $ 730,495     $ 7   $ 14             $ 813,083     $ (67) $ (82,542)   $ 1,510,864