7. Property and Equipment (Details-Depreciation) - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Property and equipment:
Depletion of costs for evaluated oil and gas properties	[1]			$ 0	$ 3,114,347
Depreciation and amortization of other property and equipment		$ 2,634	$ 3,479	5,734	7,364
Total depreciation, amortization and depletion				$ 5,734	$ 3,121,711

[1] Presented as a component of loss from discontinued operations, net of income taxes.