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10. Derivative Instruments (Details Narrative)
12 Months Ended
Dec. 31, 2015
USD ($)
$ / bbl
bbl
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Total volume on open commodity swaps, barrels | bbl 29,000
Weighted average price per barrel | $ / bbl 75.84
Proceeds from derivative liquidations | $ $ 6,255,000