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9. Derivative Instruments (Details-Derivative Gains and Losses) - USD ($) | 3 Months Ended | 9 Months Ended
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Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Gain (loss) on settled derivatives | $ 7,456,284 | $ (70,253) | $ 9,436,903 | $ (449,135)
Gain (loss) on the mark-to-market of derivatives | $ (3,297,358) | $ 2,147,798 | (4,886,184) | 1,052,639
Crude Oil Fixed Price Swap [Member] |  |  |  |
Gain (loss) on settled derivatives |  |  | 8,579,756 | (449,135)
Gain (loss) on the mark-to-market of derivatives |  |  | (4,366,810) | 1,012,502
Crude Oil Collars [Member] |  |  |  |
Gain (loss) on settled derivatives |  |  | 857,147 | 0
Gain (loss) on the mark-to-market of derivatives |  |  | $ (519,374) | $ 40,137

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 + Details
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- Definition Aggregate net gain and losses (whether realized or unrealized) on all derivative instruments held for trading purposes whether or not settled physically. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41322-113958 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4F -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624186-113959 + Details
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