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Note 8 - Income Taxes (Tables)
12 Months Ended
Dec. 31, 2022
Notes Tables  
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
  

Year Ended December 31,

 
  

2022

  

2021

  

2020

 
  (in thousands) 

U.S. Federal:

            

Current

 $  $  $(337)

Deferred

  (3,344)  (34,548)  11,814 

Foreign:

            

Current

  26,615   20,282   3,859 

Deferred

  48,149   (7,890)  12,345 

Total

 $71,420  $(22,156) $27,681 
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
  

As of December 31,

 

(in thousands)

 

2022

  

2021

 

Deferred tax assets:

        

Basis difference in fixed assets

 $9,299  $20,133 

Foreign tax credit carryforward

  14,848   20,084 

Net operating losses

  48,981   25,182 

Foreign deferred tax assets, net of impact on U.S. taxes

     8,693 

Asset retirement obligations

  8,531   8,546 

Operating lease liabilities

  10,753   1,750 

Basis difference in accrued liabilities

  3,800   402 

Basis difference in receivables

  2,783   454 

Other

  622   1,683 

Total deferred tax assets

  99,617   86,927 

Valuation allowance

  (47,583)  (46,949)

Net deferred tax assets

 $52,034  $39,978 
         

Deferred tax liabilities:

        

Basis difference in fixed assets

  (97,825)   

Net deferred tax liabilities

 $(97,825) $ 
Summary of Operating Loss Carryforwards [Table Text Block]

Jurisdiction

 

Amount

  

Expiration Period

 

U.S.

 $45,498  

No expiration

 

Gabon

 $37,983  

No expiration

 

Egypt

 $14,558   2023-2027 

Canada

 $130,542   2024-2042 
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]
  

Year Ended December 31,

 

(in thousands)

 

2022

  

2021

  

2020

 

U.S.

 $(56,750) $(38,867) $(2,908)

Foreign

  180,132   98,645   (17,494)
  $123,382  $59,778  $(20,402)
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
  

Year Ended December 31,

 

(in thousands)

 

2022

  

2021

  

2020

 

Tax provision computed at U.S. statutory rate

 $25,910  $12,553  $(4,284)

Foreign taxes not offset in U.S. by foreign tax credits

  53,851   35,306   (9,801)

Permanent differences

  778   (703)  97 

Foreign tax credit expirations

  17,247   14,060    

Increase/(decrease) in valuation allowance

  (25,623)  (83,372)  41,635 

Other

  (743)     34 

Total income tax expense (benefit)

 $71,420  $(22,156) $27,681 
Summary of Income Tax Examinations [Table Text Block]

Jurisdiction

 

Years

 

U.S.

 2014-2022 

Gabon

 2018-2022 

Egypt

 2017-2022 

Canada

 2018-2022