10. Derivative Instruments (Details-Derivative Gains and Losses) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Realized gain on derivatives, net	$ 11,477,653	$ 511,451
Gain (loss) on the mark-to-market of derivatives, net	(6,425,345)	7,793,421
Crude Oil Fixed Price Swap [Member]
Realized gain on derivatives, net	10,325,126	511,451
Gain (loss) on the mark-to-market of derivatives, net	(5,669,678)	6,827,126
Crude Oil Collars [Member]
Realized gain on derivatives, net	1,152,527	0
Gain (loss) on the mark-to-market of derivatives, net	$ (755,667)	$ 966,295