XML 47 R34.htm IDEA: XBRL DOCUMENT v3.21.1
Note 10 - Asset Retirement Obligations (Tables)
3 Months Ended
Mar. 31, 2021
Notes Tables  
Schedule of Change in Asset Retirement Obligation [Table Text Block]

Balance, December 31, 2020

 $2,282,273 

Additions

  92,574 

Liabilities settled

  (311,235)

Accretion expense

  32,091 
     

Balance, March 31, 2021

 $2,095,703