Quarterly report pursuant to Section 13 or 15(d)

Note 10 - Commitments and Contingencies (Details Textual)

v3.23.2
Note 10 - Commitments and Contingencies (Details Textual)
3 Months Ended 6 Months Ended 12 Months Ended 36 Months Ended
Aug. 09, 2023
$ / shares
May 09, 2023
$ / shares
Nov. 01, 2022
USD ($)
Aug. 20, 2022
USD ($)
Feb. 01, 2022
USD ($)
Jan. 20, 2022
USD ($)
Jun. 30, 2023
USD ($)
Mar. 31, 2023
USD ($)
Jun. 30, 2023
USD ($)
Jun. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2016
Dec. 31, 2021
Feb. 01, 2026
USD ($)
Feb. 01, 2025
USD ($)
Oct. 13, 2022
USD ($)
Jan. 19, 2022
USD ($)
Nov. 30, 2021
USD ($)
Sep. 30, 2020
Estimated Abandonment Costs                                     $ 47,800,000  
Abandonment Funding             $ 6,268,000   $ 6,268,000 $ 20,091,000 $ 20,586,000                  
Payments for Abandonment Funding               $ 15,600,000       $ 0                
Dividends Payable, Amount Per Share (in dollars per share) | $ / shares   $ 0.0625                                    
Increase (Decrease) in Other Receivables                 1,868,000 $ 943,000                    
Dividends Payable, Date Declared   May 09, 2023                                    
Dividends Payable, Date to be Paid   Jun. 23, 2023                                    
Parent Company [Member]                                        
Contractual Obligation, Total             26,800,000   26,800,000                      
Parent Company [Member] | Accrued Liabilities and Other [Member]                                        
Contractual Obligation, Total             9,400,000   9,400,000                      
Parent Company [Member] | Other Long-term Liabilities [Member]                                        
Contractual Obligation, Total             17,500,000   17,500,000                      
TransGlobe [Member]                                        
Other Receivables             50,300,000   50,300,000               $ 67,500,000 $ 67,500,000    
Egyptian General Petroleum Corporation (EGPC) [Member]                                        
Contractual Obligation, Total             150,000,000   $ 150,000,000                      
Increase (Decrease) in Other Receivables                     $ (10,000,000.0)                  
Development Timeframe (Year)                 5 years                      
Egyptian General Petroleum Corporation (EGPC) [Member] | Minimum [Member]                                        
Contractual Obligation, Total             50,000,000.0   $ 50,000,000.0                      
Sogara [Member]                                        
Other Receivables             19,700,000   19,700,000                      
Share Buyback Program [Member]                                        
Stock Repurchase Program, Authorized Amount     $ 30,000,000                                  
Stock Repurchase Program, Period in Force (Month)     20 months                                  
Subsequent Event [Member]                                        
Dividends Payable, Amount Per Share (in dollars per share) | $ / shares $ 0.0625                                      
Dividends Payable, Date Declared Aug. 09, 2023                                      
Dividends Payable, Date to be Paid Sep. 22, 2023                                      
Foreign Tax Authority [Member] | Tax Administration of Gabon [Member]                                        
Income Tax Examination, Year under Examination                         2013 2014 2015 2016            
FPSO Charter [Member]                                        
Estimated Abandonment Costs             5,600,000   5,600,000                      
Number of Charter Extension Periods                                       2
Charter Day Rates       $ 150,000                                
Other Demobilization Fees, Gross       15,300,000                                
Other Demobilization Fees, Net       $ 8,900,000     5,600,000                          
FPSO Charter [Member] | Vaalco Energy Inc. and Other Etame Marin Block Owners [Member]                                        
Estimated Abandonment Costs             $ 9,600,000   $ 9,600,000                      
Etame Marine Block [Member]                                        
Abandonment Funding               6,300,000                        
Payments for Abandonment Funding               15,600,000                        
Etame Marine Block [Member]                                        
Estimated Abandonment Costs                                     $ 81,300,000  
Abandonment Funding               10,700,000                        
Payments for Abandonment Funding               $ 26,600,000                        
Egyptian General Petroleum Corporation (EGPC) [Member] | Merged Concession Agreement [Member]                                        
Payments for Merger Related Costs, First Modernization Payment           $ 15,000,000.0                            
Payments for Merger Related Costs, Signature Bonus           $ 1,000,000.0                            
Payments for Merger Related Costs, Second Modernization Payment         $ 10,000,000.0                              
Egyptian General Petroleum Corporation (EGPC) [Member] | Merged Concession Agreement [Member] | Forecast [Member]                                        
Contractual Obligation, Total                             $ 10,000,000.0 $ 10,000,000.0