Annual report pursuant to Section 13 and 15(d)

Note 7 - Revenue (Details Textual)

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Note 7 - Revenue (Details Textual) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Jun. 20, 2026
Income Taxes Paid in Kind with Oil   $ 26,257 $ 20,103 $ 8,738  
Taxes Payable, Current, Total $ 0 $ 0 3,128    
Recovery Cost Assigned, Percent   100.00%      
Minimum [Member]          
Recovery Cost Assigned, Percent   5.00%      
Cost of Oil, Percent   25.00%      
Allocation of Profit, Percent   67.00%      
Maximum [Member]          
Recovery Cost Assigned, Percent   15.00%      
Cost of Oil, Percent   40.00%      
Allocation of Profit, Percent   84.00%      
Egyptian General Petroleum Corporation (EGPC), Merged Concession Agreement [Member]          
Ownership Percentage 50.00% 50.00%      
Egyptian General Petroleum Corporation (EGPC), South Ghazalat Concession Agreement [Member]          
Ownership Percentage 50.00% 50.00%      
Production Sharing Contract, September 17, 2018 Through September 16, 2028 [Member] | Foreign Tax Authority [Member] | Tax Administration of Gabon [Member]          
Income Taxes Paid in Kind with Oil $ 26,300        
Income Taxes Receivable $ 2,800 $ 2,800      
Taxes Payable, Current, Total     $ 3,100    
Production Sharing Contract, September 17, 2018 Through September 16, 2028 [Member] | Vaalco Energy Inc. and Other Etame Marin Block Owners [Member]          
Working Interest Ownership, Percentage 7.50% 7.50%      
Production Sharing Contract, September 17, 2018 Through September 16, 2028 [Member] | Vaalco Energy Inc. and Other Etame Marin Block Owners [Member] | Forecast [Member]          
Working Interest Ownership, Percentage         10.00%
Production Sharing Contract, September 17, 2018 Through September 16, 2028 [Member] | Government of Gabon [Member]          
Monthly Royalty Rate, Based on Production at the Published Price 13.00% 13.00%