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8. Oil and Gas Properties (Details-Capitalized Costs) - USD ($)
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Oil and Gas Exploration and Production Industries Disclosures [Abstract]    
Purchases of oil and gas properties and development costs for cash   $ 4,858,134
Purchase of oil and gas properties accrued at period-end   3,155,016
Purchase of oil and gas properties accrued at the beginning of the period   (6,899,503)
Capitalized asset retirement obligations $ 0 4,737
Total purchase and development costs, oil and gas properties   $ 1,118,384