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 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Segment Reporting Information [Line Items]        
Revenues-crude oil and natural gas sales $ 55,899,000 $ 18,256,000 $ 142,696,000 $ 54,619,000
Depreciation, depletion and amortization 6,970,000 2,212,000 16,928,000 8,116,000
Impairment of proved crude oil and natural gas properties 0 0 0 30,625,000
Bad debt expense and other 318,000 151,000 814,000 1,140,000
Other operating income (expense), net 46,000 (37,000) (440,000) (883,000)
Operating income (loss) 20,030,000 4,678,000 53,247,000 (22,971,000)
Derivative instruments gain (loss), net (5,147,000)   (21,070,000) 6,583,000
Other, net (328,000) 147,000 4,088,000 163,000
Income tax expense (benefit) (17,183,000) (2,759,000) (11,272,000) 28,470,000
Additions to crude oil and natural gas properties and equipment - accrual 6,696,000 (315,000) 10,993,000 10,296,000
Operating Segments [Member] | Gabon Segment [Member]        
Segment Reporting Information [Line Items]        
Revenues-crude oil and natural gas sales 55,899,000 18,256,000 142,696,000 54,619,000
Depreciation, depletion and amortization 6,953,000 1,946,000 16,860,000 7,790,000
Impairment of proved crude oil and natural gas properties       30,625,000
Bad debt expense and other   151,000 814,000 1,140,000
Other operating income (expense), net     (440,000) (883,000)
Operating income (loss) 22,834,000 6,957,000 64,933,000 (17,622,000)
Other, net     7,207,000  
Income tax expense (benefit) 436,000 (2,464,000) 8,396,000 19,302,000
Additions to crude oil and natural gas properties and equipment - accrual 6,696,000 (306,000) 10,993,000 10,305,000
Operating Segments [Member] | Equatorial Guinea Segment [Member]        
Segment Reporting Information [Line Items]        
Operating income (loss) (271,000) (95,000) (505,000) (289,000)
Other, net     (2,000)  
Income tax expense (benefit)   1,000 1,000 1,000
Corporate and Other [Member]        
Segment Reporting Information [Line Items]        
Depreciation, depletion and amortization 17,000 266,000 68,000 326,000
Operating income (loss) (2,533,000) (2,184,000) (11,181,000) (5,060,000)
Derivative instruments gain (loss), net (5,147,000)   (21,070,000) 6,583,000
Other, net     (3,117,000)  
Income tax expense (benefit) $ (17,619,000) (296,000) $ (19,669,000) 9,167,000
Additions to crude oil and natural gas properties and equipment - accrual   $ (9,000)   $ (9,000)