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Sale of Stock, Other Stock Issuances, Consideration Received Per Transaction

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Value of equity interests (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity.

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Number of shares of equity interest issued or issuable by acquirer as part of consideration transferred in business combination.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Cash received on stock transaction after deduction of issuance costs.

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Amount of consideration received by subsidiary or equity investee in exchange for shares of stock issued or sold. Includes amount of cash received, fair value of noncash assets received, and fair value of liabilities assumed by the investor.

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Number of shares issued under share-based payment arrangement.

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Number of new stock issued during the period.

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Stockholders’ Equity - Movement in common stock (Details) $ in Thousands, $ in Millions									1 Months Ended	12 Months Ended
	May 28, 2026 shares	Feb. 24, 2026 shares	Feb. 05, 2026 shares	Nov. 24, 2025 USD ($) shares	Nov. 24, 2025 AUD ($) shares	Sep. 30, 2025 shares	Jul. 28, 2025 shares	Jul. 23, 2025 USD ($) shares	Apr. 30, 2026 USD ($)	Jun. 30, 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
Issuance of common stock as termination payment (in shares) \| shares							50,000			50,000	312,500
Issuance of common stock as prepayment of facility fee (in shares) \| shares								112,740		112,740
Issuance of common stock pursuant to Subscription Agreement (in shares) \| shares								940,729		940,729
Other stock issuances (in shares) \| shares										9,849,108
Common stock, at the end of the period (in shares) \| shares										34,872,663	16,717,289
Details
Issuance of common stock as termination payment										$ 988
Issuance of common stock as prepayment of facility fee										2,188
Issuance of common stock pursuant to Subscription Agreement										10,966
Other stock issuances										285,954
Total										539,051
Less: Transaction costs								$ (1,400)		(17,912)	$ (400)
Amount
Common stock, value, net proceeds at beginning of period										450,437
Less: Transaction costs									$ 119,000	521,139
Common stock, value, net proceeds at end of period										$ 971,576	$ 450,437
Falcon Acquisition
Tamboran Common Stock
Number of shares transferred (in shares) \| shares	6,537,503					6,537,503				6,537,503
Details
Issuance of common stock as consideration for Falcon Acquisition										$ 224,498
Share-Based Payment Arrangement
Tamboran Common Stock
Issuance of common stock against vested equity awards/under share purchase plan (in shares) \| shares		25,271	2,505							127,500
Details
Issuance of common stock against vested equity awards/under share purchase plan										$ 3,202
Employee Stock
Tamboran Common Stock
Issuance of common stock against vested equity awards/under share purchase plan (in shares) \| shares				537,794	537,794					537,794
Details
Issuance of common stock against vested equity awards/under share purchase plan				$ 11,300	$ 17.4					$ 11,255