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Note 13 - Asset Retirement Obligations (Tables)
3 Months Ended
Mar. 31, 2023
Notes Tables  
Schedule of Change in Asset Retirement Obligation [Table Text Block]

(in thousands)

 

As of March 31, 2023

  

As of December 31, 2022

 

Beginning balance

 $42,001  $40,694 

Accretion

  556   1,958 

Additions

     6,134 

Revisions

  79   (43)

Settlements

  (123)  (6,577)

Foreign currency gain (loss)

  74   (165)

Ending balance

 $42,587  $42,001