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Note 13 - Asset Retirement Obligations (Tables)
6 Months Ended
Jun. 30, 2023
Notes Tables  
Schedule of Change in Asset Retirement Obligation [Table Text Block]

(in thousands)

 

As of June 30, 2023

  

As of December 31, 2022

 

Beginning balance

 $42,001  $40,694 

Accretion

  1,118   1,958 

Additions

     6,134 

Revisions

  5,726   (43)

Settlements

  (374)  (6,577)

Foreign currency gain (loss)

  216   (165)

Ending balance

 $48,687  $42,001