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Commitments and Contingencies (Details Textual) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Operating lease commitments [Member]    
Obligations (Textual)    
Operating Leases, Future Minimum Payments Due $ 10,000 $ 5,640
Operating Leases, Future Minimum Payments Due, Next Twelve Months 7,000 4,470
Operating Leases, Future Minimum Payments, Due in Two Years 2,400 838
Operating Leases, Future Minimum Payments, Due in Three Years 100 $ 332
Gas transportation and processing obligations [Member]    
Obligations (Textual)    
Contractual Obligation, Due in Next Fiscal Year 8,800  
Contractual Obligation, Due in Second Year 5,400  
Contractual Obligation, Due in Third Year 3,900  
Contractual Obligation, Due in Fourth Year 2,600  
Contractual Obligation, Due in Fifth Year 1,600  
Contractual Obligation $ 23,400