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9. Derivative Instruments (Details-Derivative Gains and Losses) - USD ($)
3 Months Ended 9 Months Ended
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