Quarterly report pursuant to Section 13 or 15(d)

Note 1 - Organization and Accounting Policies (Details Textual)

v3.23.2
Note 1 - Organization and Accounting Policies (Details Textual)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jan. 12, 2023
USD ($)
Jan. 01, 2023
USD ($)
Jan. 19, 2022
USD ($)
Jul. 31, 2023
USD ($)
Mar. 31, 2023
USD ($)
Jun. 30, 2023
USD ($)
Jun. 30, 2023
USD ($)
$ / item
Jun. 30, 2023
USD ($)
$ / bbl
Mar. 31, 2023
USD ($)
$ / bbl
Dec. 31, 2022
USD ($)
$ / bbl
Sep. 30, 2022
$ / bbl
Jun. 30, 2022
USD ($)
$ / bbl
Mar. 31, 2022
USD ($)
$ / bbl
Jun. 30, 2023
USD ($)
Jun. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Oct. 13, 2022
USD ($)
Oil and Gas, Average Sale Price (in USD per Per Share)             78 77.99 81.07 88.72 100.71 113.84 100.87          
Restricted Cash           $ 100 $ 100 $ 100           $ 100        
Payments for Abandonment Funding                 $ 15,600               $ 0  
Abandonment Funding Payment Due                   $ 5,800                
Reestablishment of Currency Denominated Account $ 37,300                                  
Abandonment Funding Payment Approved         $ 26,600       26,600                  
Abandonment Funding Payment Approved, Attributable to Company         15,600       15,600                  
Payment Received for Abandonment         15,600                          
Value Added Tax Receivable           15,800 15,800 15,800   13,900       15,800        
Accounts Receivable, Credit Loss Expense (Reversal)           680           $ 571   1,615 $ 1,063      
Provision for Doubtful Accounts Transferred           200     300                  
Accounts Receivable, Allowance for Credit Loss         12,832 13,519 13,519 13,519 12,832 8,704   $ 6,389 $ 6,135 13,519 $ 6,389 $ 5,741    
Prepayments for Fixed Assets           2,500 2,500 2,500           2,500        
Prepaid Insurance           1,500 1,500 1,500           1,500        
Other Prepaid Expense, Current           $ 5,100 $ 5,100 $ 5,100           $ 5,100        
Office Equipment [Member] | Maximum [Member]                                    
Property, Plant and Equipment, Useful Life (Year)           5 years 5 years 5 years           5 years        
Leasehold Improvements [Member] | Maximum [Member]                                    
Property, Plant and Equipment, Useful Life (Year)           7 years 7 years 7 years           7 years        
Leasehold Improvements [Member] | Minimum [Member]                                    
Property, Plant and Equipment, Useful Life (Year)           5 years 5 years 5 years           5 years        
GABON                                    
Prepaid Royalties           $ 2,700 $ 2,700 $ 2,700           $ 2,700        
EGYPT                                    
Prepaid Fuel           4,000 4,000 4,000           4,000        
Advances to Contractors           1,900 1,900 1,900           1,900        
Prepaid Payroll           400 400 400           400        
Tax Administration of Gabon [Member]                                    
Provision for Value Added Tax           500               1,100        
Block P Offshore Equatorial Guinea [Member]                                    
Accounts Receivable, Allowance for Credit Loss           500 $ 500 $ 500           $ 500        
Oil Delivery [Member]                                    
Accounts Receivable, Credit Loss Expense (Reversal)           $ 0     400                  
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]                                    
Other Receivables   $ 18,200                                
Accounts Receivable, Credit Loss Expense (Reversal)   3,100                                
Accounts Receivable, Allowance for Credit Loss   $ 3,100     $ (0)       $ (0) $ 3,120     $ (0)     $ (0)    
Communaute Financiere Africaine BEAC, Francs                                    
Foreign Currency Exchange Rate, Translation           602.552 602.552 602.552   612.6       602.552        
Canada, Dollars                                    
Foreign Currency Exchange Rate, Translation           0.755 0.755 0.755   0.738       0.755        
Vaalco Energy Inc. and Other Etame Marin Block Owners [Member]                                    
Value Added Tax Receivable           $ 24,300 $ 24,300 $ 24,300   $ 21,800       $ 24,300        
TransGlobe [Member]                                    
Proceeds From Other Receivables                   $ 17,200                
Merged Concession Agreement, Development Term (Year)     15 years                              
Merged Concession Agreement, Extension Term (Year)     5 years                              
Other Receivables     $ 67,500     50,300 50,300 50,300           50,300       $ 67,500
Production Sharing Contract, September 17, 2018 Through September 16, 2028 [Member]                                    
Accounts Payable, Other, Current           19,700 19,700 19,700           19,700        
Production Sharing Contract, September 17, 2018 Through September 16, 2028 [Member] | Subsequent Event [Member]                                    
Proceeds From Other Receivables       $ 1,900                            
Other, Net [Member]                                    
Accounts Receivable, after Allowance for Credit Loss           $ 19,700 $ 19,700 $ 19,700           $ 19,700        
Purchase Commitment [Member]                                    
Number of Contracts Entered Into                               2