Annual report pursuant to Section 13 and 15(d)

ASSET RETIREMENT OBLIGATION (Details)

v3.6.0.2
ASSET RETIREMENT OBLIGATION (Details) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Asset Retirement Obligation [Line Items]      
Balance $ 7,401,950 $ 3,896,489 $ 1,182,410
Liabilities acquired   3,361,634 575,977
Liabilities incurred 308,509 171,635 2,022,445
Liabilities settled (240,606) (446,192) (39,316)
Accretion expense 487,182 418,384 154,973
Balance $ 7,957,035 $ 7,401,950 $ 3,896,489