Quarterly report pursuant to Section 13 or 15(d)

Note 3 - Acquisitions and Dispositions (Details Textual)

v3.22.2.2
Note 3 - Acquisitions and Dispositions (Details Textual)
$ / shares in Units, $ in Thousands, shares in Millions
3 Months Ended 6 Months Ended 9 Months Ended
Oct. 13, 2022
$ / shares
shares
Apr. 29, 2021
USD ($)
Feb. 25, 2021
USD ($)
Sep. 30, 2022
USD ($)
$ / shares
Jun. 30, 2022
USD ($)
Mar. 31, 2022
USD ($)
Sep. 30, 2021
USD ($)
Jun. 30, 2021
USD ($)
Mar. 31, 2021
USD ($)
Jun. 30, 2021
USD ($)
Sep. 30, 2022
USD ($)
$ / shares
Sep. 30, 2021
USD ($)
Dec. 31, 2021
$ / shares
Feb. 24, 2021
Nov. 30, 2006
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares       $ 0.10             $ 0.10   $ 0.10    
Business Combination, Bargain Purchase, Gain Recognized, Amount                     $ (0) $ 7,651      
Revenues, Total       $ 78,097     $ 55,899       257,738 142,696      
Net Income (Loss) Attributable to Parent, Total       6,868 $ 15,104 $ 12,164 31,721 $ 5,884 $ 9,869   34,136 47,474      
Block 5 PSA [Member]                              
Equity Method Investment, Ownership Percentage                             40.00%
Equity Method Investment, Additional Working Interest Percentage                             10.00%
TransGlobe Shareholders [Member]                              
Business Combination, Acquisition Related Costs       6,400             7,600        
Etame Marine Block [Member]                              
Noncontrolling Interest, Ownership Percentage by Parent     58.80%                     31.10%  
Subsequent Event [Member]                              
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares $ 0.10                            
Subsequent Event [Member] | VAALCO Energy [Member] | VAALCO Stockholders [Member]                              
Noncontrolling Interest, Ownership Percentage by Parent 54.50%                            
Subsequent Event [Member] | VAALCO Energy [Member] | TransGlobe Shareholders [Member]                              
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 45.50%                            
TransGlobe [Member] | Subsequent Event [Member]                              
Business Acquisition, Exchange Ratio 0.6727                            
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | shares 49.3                            
Etame Marine Block [Member]                              
Business Combination, Acquisition Related Costs                   $ 1,000          
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage     31.10%                        
Business Combination, Step Acquisition, Equity Interest in Acquiree, Including Subsequent Acquisition, Percentage     58.80%                        
Business Combination, Bargain Purchase, Gain Recognized, Amount     $ 7,700             $ 7,700          
Business Combination, Bargain Purchase Gain, Recognized Amount, Net of Tax     5,500                        
Business Combination, Bargain Purchase Gain, Recognized Amount, Tax Expense (Benefit)     (2,200)                        
Revenues, Total       36,900     26,400       121,600 58,000      
Net Income (Loss) Attributable to Parent, Total       $ 3,300     $ 10,200       $ 16,100 $ 20,100      
Business Combination, Contingent Consideration, Liability, Total     $ 5,000                        
Business Combination, Contingent Consideration, Measurement Period of Oil Price (Day)     90 days                        
Business Combination, Contingent Consideration, Oil Price Threshold     60.00                        
Payment for Contingent Consideration Liability, Investing Activities   $ 5,000                          
Etame Marine Block [Member] | Sasol Gabon S.A. [Member]                              
Business Acquisition, Percentage of Voting Interests Acquired     27.80%