XML 63 R50.htm IDEA: XBRL DOCUMENT v3.19.1
Note 10 - Asset Retirement Obligations - Asset Retirement Obligations (Details) - USD ($)
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Balance $ 1,824,419  
Additions 1,294  
Accretion expense 32,778 $ 3,056
Liabilities settled  
Balance $ 1,858,491