Asset retirement obligations (ARO) (Tables)

6 Months Ended

Jun. 30, 2015

Asset Retirement Obligation Disclosure [Abstract]

Reconciliation of Asset Retirement Obligations (ARO)

Balance, December 31, 2014	$	749,013
Liabilities incurred		—
Accretion expense		34,635
Revisions to estimate		—
Balance, June 30, 2015		783,648
Less current asset retirement obligations		(192,994	)
Long-term asset retirement obligations	$	590,654