Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Numerator:
Net loss after income tax attributable to Tamboran Resources Corporation stockholders	$ (8,182)	$ (5,895)
Denominator:
Weighted average number of common stock outstanding, basic (in shares)	17,525,363	14,124,788
Weighted average number of common stock outstanding, diluted (in shares)	17,525,363	14,124,788
Net loss per share, basic (in USD per share)	$ (0.467)	$ (0.417)
Net loss per share, diluted (in USD per share)	$ (0.467)	$ (0.417)