Annual report pursuant to Section 13 and 15(d)

Segment Information (Segment Activity) (Details)

v3.20.4
Segment Information (Segment Activity) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Segment Reporting Information [Line Items]      
Revenues-crude oil and natural gas sales $ 67,176 $ 84,521 $ 104,943
Depreciation, depletion and amortization 9,382 7,083 5,596
Gain on revision of asset retirement obligations   (379) (3,325)
Impairment of proved crude oil and natural gas properties 30,625    
Bad debt (recovery) expense and other 1,165 (341) (77)
Other operating expense, net (1,669) (4,421) 365
Operating income (loss) (27,263) 21,193 51,287
Derivative instruments gain, net 6,577 (446) 4,264
Interest income (expense), net 155 733 (145)
Other, net 129 (438) 68
Income tax expense (benefit) 27,681 23,890 (43,254)
Additions to crude oil and natural gas properties and equipment - accrual 10,494 22,173 38,634
Gabon Segment [Member]      
Segment Reporting Information [Line Items]      
Revenues-crude oil and natural gas sales     104,938
Depreciation, depletion and amortization     5,176
Gain on revision of asset retirement obligations     (3,325)
Bad debt (recovery) expense and other     (77)
Other operating expense, net     365
Operating income (loss)     61,930
Interest income (expense), net     (396)
Other, net     92
Income tax expense (benefit)     (26,670)
Additions to crude oil and natural gas properties and equipment - accrual     38,430
Equatorial Guinea Segment [Member]      
Segment Reporting Information [Line Items]      
Operating income (loss)     (470)
Other, net     (4)
Additions to crude oil and natural gas properties and equipment - accrual     187
Operating Segments [Member] | Gabon Segment [Member]      
Segment Reporting Information [Line Items]      
Revenues-crude oil and natural gas sales 67,176 84,521  
Depreciation, depletion and amortization 9,028 6,825  
Gain on revision of asset retirement obligations   (379)  
Impairment of proved crude oil and natural gas properties 30,625    
Bad debt (recovery) expense and other 1,165 (341)  
Other operating expense, net (1,669) (4,456)  
Operating income (loss) (17,261) 35,049  
Interest income (expense), net   5  
Other, net 194 (230)  
Income tax expense (benefit) 16,204 20,311  
Additions to crude oil and natural gas properties and equipment - accrual 10,503 22,116  
Operating Segments [Member] | Equatorial Guinea Segment [Member]      
Segment Reporting Information [Line Items]      
Operating income (loss) (431) (438)  
Other, net 3 (3)  
Income tax expense (benefit) 1 12  
Corporate and Other [Member]      
Segment Reporting Information [Line Items]      
Revenues-crude oil and natural gas sales     5
Depreciation, depletion and amortization 354 258 420
Other operating expense, net   35  
Operating income (loss) (9,571) (13,418) (10,173)
Derivative instruments gain, net 6,577 (446) 4,264
Interest income (expense), net 155 728 251
Other, net (68) (205) (20)
Income tax expense (benefit) 11,476 3,567 (16,584)
Additions to crude oil and natural gas properties and equipment - accrual $ (9) $ 57 $ 17