XML 59 R47.htm IDEA: XBRL DOCUMENT v3.6.0.2
Changes to Asset Retirement Obligation (Details) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Jun. 30, 2016
Asset Retirement Obligation Disclosure [Abstract]          
Balance at beginning of period     $ 1,402,039 $ 1,294,497 $ 1,294,497
Accretion expense (Note 9) $ 34,322 $ 36,998 68,644 $ 73,996 147,992
Payments     (62,771)   (161,018)
Change in estimate of existing obligation         120,568
Balance at end of period $ 1,407,912   $ 1,407,912   $ 1,402,039