v3.26.1
Stockholders’ Equity - Schedule of Movement in Common Stock (Details)
$ / shares in Units, $ in Thousands, $ in Millions
1 Months Ended 9 Months Ended 12 Months Ended
Feb. 24, 2026
USD ($)
$ / shares
shares
Feb. 05, 2026
USD ($)
$ / shares
shares
Jan. 16, 2026
USD ($)
$ / shares
shares
Dec. 15, 2025
USD ($)
$ / shares
shares
Dec. 12, 2025
USD ($)
$ / shares
shares
Dec. 09, 2025
USD ($)
$ / shares
shares
Dec. 04, 2025
USD ($)
$ / shares
shares
Nov. 24, 2025
USD ($)
$ / shares
shares
Nov. 24, 2025
AUD ($)
shares
Oct. 27, 2025
USD ($)
$ / shares
shares
Jul. 28, 2025
$ / shares
shares
Jul. 23, 2025
USD ($)
$ / shares
shares
Nov. 30, 2025
USD ($)
$ / shares
shares
Sep. 30, 2025
USD ($)
$ / shares
shares
Jul. 31, 2025
USD ($)
$ / shares
shares
Mar. 31, 2026
USD ($)
shares
Jun. 30, 2025
USD ($)
shares
Tamboran
common stock                                   
Common stock, at the beginning of the period (in shares) | shares                             16,717,289 16,717,289  
Issuance of common stock pursuant to Subscription Agreement (in shares) | shares                       940,729     940,729    
Issuance of common stock as prepayment of facility fee (in shares) | shares                       112,740     112,740    
Issuance of common stock as termination payment (in shares) | shares                     50,000     50,000      
Common stock, at the end of the period (in shares) | shares                               22,667,289 16,717,289
Fair market value at time of issuance                                  
Issuance of common stock pursuant to Subscription Agreement (in USD per share) | $ / shares                       $ 17.74     $ 17.74    
Issuance of common stock as prepayment of Facility Fee (in USD per share) | $ / shares                       $ 19.41     $ 19.41    
Issuance of common stock (in USD per share) | $ / shares                     $ 19.75     $ 19.75      
Details                                  
Issuance of common stock pursuant to Subscription Agreement                             $ 10,966    
Issuance of common stock as prepayment of Facility Fee                             2,188    
Issuance of common stock                           $ 988      
Less: Transaction costs                       $ (1,400)       $ (5,603) $ (400)
Cumulative net proceeds                                  
Common stock, value, net proceeds at beginning of period                             $ 450,437 450,437  
Less: Transaction costs                               110,395  
Common stock, value, net proceeds at end of period                               $ 560,832 $ 450,437
Employee Stock [Member]                                  
Tamboran
common stock                                   
Issuance of common stock under share purchase plan/against vested equity awards (in shares) | shares               537,794 537,794       537,794        
Fair market value at time of issuance                                  
Issuance of common stock under share purchase plan/against vested equity awards (in USD per share) | $ / shares               $ 20.93         $ 20.93        
Details                                  
Issuance of common stock under share purchase plan/against vested equity awards               $ 11,300 $ 17.4       $ 11,255        
Share-based payment arrangement                                  
Tamboran
common stock                                   
Issuance of common stock under share purchase plan/against vested equity awards (in shares) | shares 25,271 2,505                              
Fair market value at time of issuance                                  
Issuance of common stock under share purchase plan/against vested equity awards (in USD per share) | $ / shares $ 25.74 $ 20.99                              
Details                                  
Issuance of common stock under share purchase plan/against vested equity awards $ 650 $ 53                              
Tranche 1 | Share-based payment arrangement                                  
Tamboran
common stock                                   
Issuance of common stock under share purchase plan/against vested equity awards (in shares) | shares             38,500                    
Fair market value at time of issuance                                  
Issuance of common stock under share purchase plan/against vested equity awards (in USD per share) | $ / shares             $ 21.73                    
Details                                  
Issuance of common stock under share purchase plan/against vested equity awards             $ 837                    
Tranche 2 | Share-based payment arrangement                                  
Tamboran
common stock                                   
Issuance of common stock under share purchase plan/against vested equity awards (in shares) | shares           7,650                      
Fair market value at time of issuance                                  
Issuance of common stock under share purchase plan/against vested equity awards (in USD per share) | $ / shares           $ 21.73                      
Details                                  
Issuance of common stock under share purchase plan/against vested equity awards           $ 166                      
Tranche 3 | Share-based payment arrangement                                  
Tamboran
common stock                                   
Issuance of common stock under share purchase plan/against vested equity awards (in shares) | shares         2,309                        
Fair market value at time of issuance                                  
Issuance of common stock under share purchase plan/against vested equity awards (in USD per share) | $ / shares         $ 20.99                        
Details                                  
Issuance of common stock under share purchase plan/against vested equity awards         $ 48                        
Tranche 4 | Share-based payment arrangement                                  
Tamboran
common stock                                   
Issuance of common stock under share purchase plan/against vested equity awards (in shares) | shares       5,002                          
Fair market value at time of issuance                                  
Issuance of common stock under share purchase plan/against vested equity awards (in USD per share) | $ / shares       $ 19.99                          
Details                                  
Issuance of common stock under share purchase plan/against vested equity awards       $ 100                          
Tranche 5 | Share-based payment arrangement                                  
Tamboran
common stock                                   
Issuance of common stock under share purchase plan/against vested equity awards (in shares) | shares       30,012                          
Fair market value at time of issuance                                  
Issuance of common stock under share purchase plan/against vested equity awards (in USD per share) | $ / shares       $ 19.99                          
Details                                  
Issuance of common stock under share purchase plan/against vested equity awards       $ 600                          
Public stock offering                                  
Tamboran
common stock                                   
Issuance of common stock under public offering (in shares) | shares                   2,673,111              
Fair market value at time of issuance                                  
Issuance of common stock (in USD per share) | $ / shares                   $ 21.00              
Details                                  
Issuance of common stock                   $ 56,135              
Subscription agreements                                  
Tamboran
common stock                                   
Issuance of common stock under public offering (in shares) | shares     1,524,377                            
Fair market value at time of issuance                                  
Issuance of common stock (in USD per share) | $ / shares     $ 21.00                            
Details                                  
Issuance of common stock     $ 32,012