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PROPERTY AND EQUIPMENT AND ASSET RETIREMENT OBLIGATION (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2016 | Sep. 30, 2015
Property and equipment |  |
Gross Property and Equipment | $ 76,868 | $ 75,953
Accumulated Depletion, Depreciation, and Amortization | (69,966) | (66,485)
Net Property and Equipment | 6,902 | 9,468
Change in the asset retirement obligation |  |
Balance at the beginning of the year | 6,936 | 9,163
Obligations incurred on new wells drilled or acquired | 167 | 316
Liabilities associated with properties sold | 0 | (2,013)
Revision of estimated obligation | (68) | 918
Accretion expense | 464 | 632
Payments | (459) | (655)
Foreign currency translation adjustment | 154 | (1,425)
Balance at the end of the year | 7,194 | 6,936
Less current portion | (1,017) | (506)
Asset retirement obligation, long-term | 6,177 | 6,430
Land |  |
Property and equipment |  |
Gross Property and Equipment | 365 | 863
Net Property and Equipment | 365 | 863
Oil and natural gas properties |  |
Property and equipment |  |
Gross Property and Equipment | 66,265 | 63,105
Accumulated Depletion, Depreciation, and Amortization | (61,060) | (57,460)
Net Property and Equipment | 5,205 | 5,645
Drilling rigs and equipment |  |
Property and equipment |  |
Gross Property and Equipment | 6,379 | 6,598
Accumulated Depletion, Depreciation, and Amortization | (5,770) | (5,825)
Net Property and Equipment | $ 609 | $ 773
Drilling rigs and equipment | Minimum |  |
Property and equipment |  |
Estimated useful lives | 3 years | 3 years
Drilling rigs and equipment | Maximum |  |
Property and equipment |  |
Estimated useful lives | 10 years | 10 years
Offices |  |
Property and equipment |  |
Estimated useful lives | 40 years | 40 years
Gross Property and Equipment | $ 857 | $ 2,420
Accumulated Depletion, Depreciation, and Amortization | (274) | (445)
Net Property and Equipment | 583 | 1,975
Other property and equipment |  |
Property and equipment |  |
Gross Property and Equipment | 3,002 | 2,967
Accumulated Depletion, Depreciation, and Amortization | (2,862) | (2,755)
Net Property and Equipment | $ 140 | $ 212
Other property and equipment | Minimum |  |
Property and equipment |  |
Estimated useful lives | 3 years | 3 years
Other property and equipment | Maximum |  |
Property and equipment |  |
Estimated useful lives | 17 years | 17 years

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- Definition Amount of asset retirement obligations divested during the period. + References No definition available. + Details
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- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Asset Retirement Obligation -URI http://asc.fasb.org/extlink&oid=6505190 + Details
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- Definition Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392676&loc=d3e7480-110848 + Details
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- Definition Amount of foreign currency translation gain (loss) which decreases (increases) asset retirement obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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- Definition Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 35 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6392603&loc=d3e7123-110846 + Details
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