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Number of new stock issued during the period.

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Related Party Transactions (Details) $ in Thousands				1 Months Ended	12 Months Ended
Related Party Transactions (Details) $ in Thousands	Jul. 28, 2025 shares	Jul. 23, 2025 USD ($)	Jun. 03, 2024	Oct. 31, 2024	Jun. 30, 2026 USD ($) shareholder shares	Jun. 30, 2025 USD ($) shares	Jun. 30, 2023 USD ($)	Jul. 01, 2023
Related Party Transaction [Line Items]
Number of shareholders \| shareholder					2
Proceeds from issue of common stock		$ 16,700			$ 308,498	$ 46,092
Accounts payable and accrued expenses					$ 73,742	$ 20,457
Capital raise (in shares) \| shares	50,000				50,000	312,500
Equipment
Related Party Transaction [Line Items]
Term of contract, rig								25 months
Variable interest entity, primary beneficiary \| Tamboran (B1) Pty Ltd ("TB1")
Related Party Transaction [Line Items]
Accounts payable and accrued expenses					$ 44,788	$ 12,507
Variable interest entity, primary beneficiary \| Tamboran SPCF Pty Ltd (“TR SPCF")
Related Party Transaction [Line Items]
Accounts payable and accrued expenses					$ 7,380	4,364
Variable interest entity, primary beneficiary \| Daly Waters Energy, LP (“DWE”) \| Tamboran (B1) Pty Ltd ("TB1")
Related Party Transaction [Line Items]
Joint venture, ownership percentage			50.00%		50.00%
Variable interest entity, primary beneficiary \| Tamboran Resources Corporation \| SPCF Sub Trust
Related Party Transaction [Line Items]
Joint venture, ownership percentage			50.00%
Variable interest entity, primary beneficiary \| Daly Waters Infrastructure, LP (“DWI”) \| Tamboran SPCF Pty Ltd (“TR SPCF")
Related Party Transaction [Line Items]
Joint venture, ownership percentage				50.00%
Co-venturer
Related Party Transaction [Line Items]
Accounts payable and accrued expenses					$ 1,800
Co-venturer \| Variable interest entity, primary beneficiary \| Daly Waters Energy, LP (“DWE”) \| Beetaloo Basin
Related Party Transaction [Line Items]
Expenditures for which contributions are due					71,300	55,100
Unpaid cash calls receivable					1,500	7,100
Co-venturer \| Variable interest entity, primary beneficiary \| Daly Waters Infrastructure, LP (“DWI”) \| Beetaloo Basin
Related Party Transaction [Line Items]
Unpaid cash calls receivable						500
Co-venturer \| Variable interest entity, primary beneficiary \| Daly Waters Infrastructure, LP (“DWI”) \| Tamboran SPCF Pty Ltd (“TR SPCF")
Related Party Transaction [Line Items]
Expenditures for which contributions are due					$ 0	$ 3,600
Equity investment \| Majority shareholder
Related Party Transaction [Line Items]
Proceeds from issue of common stock							$ 15,000