Quarterly report pursuant to Section 13 or 15(d)

Organization And Accounting Policies (Narrative) (Details)

v3.19.1
Organization And Accounting Policies (Narrative) (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2019
USD ($)
$ / bbl
/ $
Mar. 31, 2018
USD ($)
Dec. 31, 2018
USD ($)
$ / bbl
Organization And Accounting Policies [Line Items]      
Receivable balance, net $ 9,036   $ 11,907
Exchange rate | / $ 584.7    
Bad debt recovery and other $ 29 $ 56  
Derivative cap price | $ / bbl 74.00   74.00
Derivative floor price | $ / bbl 74.00   74.00
Transfers between levels $ 0    
Monthly royalty rate, based on production at the published price 13.00%    
Working interest of carried partner, percentage 7.50%    
Future working interest of carried partner percentage 10.00%    
Gains on foreign currency transactions $ 200 100  
Gabon      
Organization And Accounting Policies [Line Items]      
Receivable balance, gross, noncurrent 7,700    
Receivable balance, net, noncurrent 2,600    
Bad debt recovery and other $ 32 $ 100