SUPPLEMENTARY OIL AND NATURAL GAS INFORMATION (UNAUDITED) (Details) bbl in Thousands, MMcf in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2017 USD ($) Boe MMcf bbl	Sep. 30, 2016 USD ($) Boe MMcf bbl	Sep. 30, 2017 USD ($) Boe	Sep. 30, 2016 USD ($)
Oil and Gas Exploration and Production Industries Disclosures [Abstract]
Proved undeveloped reserves | Boe			0
Changes in the estimates of net interests in total proved developed reserves of oil and natural gas liquids and natural gas
Balance at the beginning of the period | Boe	698,000	1,008,000
Revisions of previous estimates | Boe	447,000	(251,000)
Extensions, discoveries and other additions | Boe		70,000
Acquisitions of reserves | Boe	38,000	37,000
Less sales of reserves | Boe	(101,000)
Less production | Boe	(151,000)	(166,000)
Balance at the end of the period | Boe	931,000	698,000
Capitalized Costs Relating to Oil and Natural Gas Producing Activities
Proved properties			$ 68,522	$ 66,044
Unproved properties			186	221
Total capitalized costs			68,708	66,265
Accumulated depletion and depreciation			64,915	61,060
Net capitalized costs			3,793	5,205
Costs Incurred in Oil and Natural Gas Property Acquisition, Exploration and Development
Acquisition of unproved properties	$ 70	$ 161
Acquisition of proved properties	381	608
Development costs	586	1,103
Total	1,037	1,872
Additions and revisions to asset retirement obligation included in development costs	188	99
Results of Operations for Oil and Natural Gas Producing Activities
Net revenues	4,383	3,177
Production costs	(3,028)	(3,142)
Depletion	(848)	(1,236)
Impairment of assets	0	(1,154)
Pre-tax results of operations	507	(2,355)
Estimated income tax benefit (expense)	282	297
Results of operations	789	(2,058)
Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Abstract]
Future cash inflows			24,786	17,259
Future production costs			(15,140)	(11,951)
Future development costs			(1,172)	(426)
Future income tax expenses			(2,401)	(1,016)
Future net cash flows			6,073	3,866
10% annual discount for timing of cash flows			(1,756)	(956)
Standardized measure of discounted future net cash flows	2,910	4,035	$ 4,317	$ 2,910
Changes in the Standardized Measure of Discounted Future Net Cash Flows
Beginning of year	2,910	4,035
Sales of oil and natural gas produced, net of production costs	(1,355)	(35)
Net changes in prices and production costs, net of royalties and wellhead taxes	3,033	(4,134)
Extensions and discoveries	0	1,285
Net change due to purchases and sales of minerals in place	(305)	470
Revisions of previous quantity estimates	511	(343)
Net change in income taxes	(1,247)	98
Accretion of discount	305	412
Other - changes in the timing of future production and other	400	1,018
Other - net change in Canadian dollar translation rate	65	104
Net change	1,407	(1,125)
End of year	$ 4,317	$ 2,910
OIL & NGL (Bbls)
Changes in the estimates of net interests in total proved developed reserves of oil and natural gas liquids and natural gas
Balance at the beginning of the period | bbl	450	469
Revisions of previous estimates | bbl	85	(23)
Extensions, discoveries and other additions | bbl		54
Acquisitions of reserves | bbl	31	34
Less sales of reserves | bbl	(67)
Less production | bbl	(86)	(84)
Balance at the end of the period | bbl	413	450
GAS (Mcf)
Changes in the estimates of net interests in total proved developed reserves of oil and natural gas liquids and natural gas
Balance at the beginning of the period | MMcf	1,441	3,124
Revisions of previous estimates | MMcf	2,103	(1,320)
Extensions, discoveries and other additions | MMcf		95
Acquisitions of reserves | MMcf	39	18
Less sales of reserves | MMcf	(200)
Less production | MMcf	(378)	(476)
Balance at the end of the period | MMcf	3,005	1,441