Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Revenue - Revenues from Contracts with Customers and Other Items Not Associated with Customer Contracts (Details)

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Note 6 - Revenue - Revenues from Contracts with Customers and Other Items Not Associated with Customer Contracts (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Crude oil and natural gas sales $ 78,097 $ 55,899 $ 257,738 $ 142,696
Crude Oil Sales and Purchase Agreements [Member]        
Sales under the COSPA or COSMA 87,661 42,056 289,290 136,693
Gabonese Government Share of Profit Oil [Member]        
Other items reported in revenue not associated with customer contracts 0 20,103 0 20,103
Carried Interest Recoupment [Member]        
Other items reported in revenue not associated with customer contracts 2,360 1,794 5,843 5,948
Oil and Gas [Member]        
Royalties (11,924) (8,054) (37,395) (20,048)
Crude oil and natural gas sales $ 78,097 $ 55,899 $ 257,738 $ 142,696