Quarterly report pursuant to Section 13 or 15(d)

Segment Information (Segment Activity) (Details)

v3.21.2
Segment Information (Segment Activity) (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Segment Reporting Information [Line Items]        
Revenues-crude oil and natural gas sales $ 47,023,000 $ 17,974,000 $ 86,797,000 $ 36,363,000
Depreciation, depletion and amortization 5,810,000 2,801,000 9,958,000 5,904,000
Impairment of proved crude oil and natural gas properties 0 0 0 30,625,000
Bad debt expense and other 395,000 179,000 496,000 989,000
Other operating expense, net (126,000) (815,000) (486,000) (846,000)
Operating income (loss) 18,874,000 (966,000) 33,217,000 (27,649,000)
Derivative instruments gain (loss), net (9,969,000) (756,000) (15,923,000) 6,583,000
Other, net (164,000) 47,000 4,416,000 16,000
Income tax expense (benefit) 2,825,000 (2,249,000) 5,911,000 31,229,000
Additions to crude oil and natural gas properties and equipment - accrual 1,782,000 1,190,000 4,297,000 10,611,000
Operating Segments [Member] | Gabon Segment [Member]        
Segment Reporting Information [Line Items]        
Revenues-crude oil and natural gas sales 47,023,000 17,974,000 86,797,000 36,363,000
Depreciation, depletion and amortization 5,786,000 2,772,000 9,907,000 5,844,000
Impairment of proved crude oil and natural gas properties       30,625,000
Bad debt expense and other       989,000
Other operating expense, net   (815,000)   (846,000)
Operating income (loss) 23,419,000 1,704,000 42,099,000 (24,579,000)
Other, net     7,525,000  
Income tax expense (benefit) 2,721,000 (273,000) 7,960,000 21,766,000
Additions to crude oil and natural gas properties and equipment - accrual 1,782,000 1,190,000 4,297,000 10,611,000
Operating Segments [Member] | Equatorial Guinea Segment [Member]        
Segment Reporting Information [Line Items]        
Operating income (loss) (102,000) (69,000) (234,000) (194,000)
Other, net     (1,000)  
Income tax expense (benefit)     1,000  
Corporate and Other [Member]        
Segment Reporting Information [Line Items]        
Depreciation, depletion and amortization 24,000 29,000 51,000 60,000
Operating income (loss) (4,443,000) (2,601,000) (8,648,000) (2,876,000)
Derivative instruments gain (loss), net (9,969,000) (756,000) (15,923,000) 6,583,000
Other, net     (3,108,000)  
Income tax expense (benefit) $ 104,000 $ (1,976,000) $ (2,050,000) $ 9,463,000