XML 44 R31.htm IDEA: XBRL DOCUMENT v3.20.2
Note 10 - Asset Retirement Obligations (Tables)
6 Months Ended
Jun. 30, 2020
Notes Tables  
Schedule of Change in Asset Retirement Obligation [Table Text Block]

Balance, December 31, 2019

 $2,044,705 

Additions

  5,769 

Accretion expense

  69,502 

Liabilities settled

  - 
     

Balance, June 30, 2020

 $2,119,976