7. Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2015

Property and equipment:

Property and equipment

	December 31,
	2015			2014
Oil and natural gas properties, full cost method:
Evaluated costs	$	131,168,906		$	112,418,105
Unevaluated costs, not subject to amortization or ceiling test		10,394			591,121
		131,179,300			113,009,226
Other property and equipment		139,004			139,004
		131,318,304			113,148,230
Less: Accumulated depreciation, amortization, depletion and impairments		(99,468,927	)		(18,902,524	)
Total property and equipment, net	$	31,849,377		$	94,245,706

Depreciation, depletion, and amortization expense

	Years Ended
	December 31,
	2015		2014
Depletion of costs for evaluated oil and natural gas properties	$	9,278,108	$	9,359,952
Depreciation and amortization of other property and equipment		16,295		29,138
Total depreciation, amortization and depletion	$	9,294,403	$	9,389,090