Basis of Presentation - Schedule of Finite-Lived Intangible Assets (Details) - USD ($)	9 Months Ended	12 Months Ended
	Jun. 30, 2017	Sep. 30, 2016
Finite-lived Intangible Assets [Roll Forward]
Unproved oil and natural gas properties, beginning of period	$ 171,000	$ 608,000
Activity during fiscal year	0	0
Change in fair value of intangible asset	0	0
Disposal of property	0	(437,000)
Unproved oil and natural gas properties, end of period	$ 171,000	$ 171,000