Oil and Natural Gas Properties (Tables)

9 Months Ended

Jun. 30, 2021

Extractive Industries [Abstract]

Schedule of Oil and Gas Properties

Oil and natural gas properties are summarized below:

	June 30, 2021		September 30, 2020
	(In thousands)
Proved	$	373,367	$	326,420
Unproved	22,294		32,084
Work-in-progress	15,008		15,398
	410,669		373,902
Accumulated depletion and amortization	(81,787)		(63,176)
Total oil and natural gas properties, net	$	328,882	$	310,726

Schedule of Exploration Expenses

The following table summarizes the components of exploration expenses:

	Three Months Ended June 30,				Nine Months Ended June 30,
	2021		2020		2021		2020
	(In thousands)
Expiration of oil and natural gas leases	$	2,785	$	6,757	$	8,615	$	7,288
Geological and geophysical costs	—		—		67		1,943
Total exploration costs	$	2,785	$	6,757	$	8,682	$	9,231