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5. OIL AND GAS PROPERTIES (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | --- | ---
Oil and gas properties subject to amortization | $ 68,306 | $ 64,655 | $ 24,057
Oil and gas properties not subject to amortization | 0 | 0 | 8,159
Asset retirement costs | 163 | 137 | 76
Accumulated depreciation, depletion and impairment | (11,074) | (6,025) | (10,237)
Total oil and gas properties, net | 57,395 | 58,767 | $ 22,055
Additions [Member] |  |  |
Oil and gas properties subject to amortization | 3,651 | 47,561 |
Oil and gas properties not subject to amortization | 0 | 0 |
Asset retirement costs | 26 | 63 |
Accumulated depreciation, depletion and impairment | (5,049) | (6,441) |
Total oil and gas properties, net | (1,372) | 41,183 |
Disposals [Member] |  |  |
Oil and gas properties subject to amortization | 0 | (7,252) |
Oil and gas properties not subject to amortization | 0 | (7,870) |
Asset retirement costs | 0 | (2) |
Accumulated depreciation, depletion and impairment | 0 | 10,653 |
Total oil and gas properties, net | 0 | (4,471) |
Transfers [Member] |  |  |
Oil and gas properties subject to amortization | 0 | 289 |
Oil and gas properties not subject to amortization | 0 | (289) |
Asset retirement costs | 0 | 0 |
Accumulated depreciation, depletion and impairment | 0 | 0 |
Total oil and gas properties, net | $ 0 | $ 0 |

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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 accumulated depreciation, depletion, amortization and impairment of oil and gas property carried under the successful effort method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61901-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10(b)) -URI http://asc.fasb.org/extlink&oid=50486907&loc=d3e511914-122862 + Details
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- Definition Amount of accumulated depreciation, depletion and amortization of oil and gas property carried under the successful effort method. Oil and gas property include, but not limited to, the entity's wells and related equipment and facilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61901-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10.(b)) -URI http://asc.fasb.org/extlink&oid=50486907&loc=d3e511914-122862 + Details
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