Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounts Payable and Accrued Liabilities [Abstract]
Accounts payable	$ 7,670	$ 3,274
Oil and gas revenue suspense	2,675	1,776
Gathering and transportation payables	1,774	497
Production taxes payable	1,860	214
Drilling advances received from joint venture partner		245
Accrued drilling costs	3,155	684
Accrued lease operating costs	3,474	1,054
Accrued ad valorem taxes-current	3,111	2,473
Accrued general and administrative expenses	3,099	380
Accrued asset retirement obligation-current	955	247
Accrued interest	5,441
Accrued gas purchases	1,603
Other liabilities		374
Total accounts payable and accrued liabilities	$ 34,816	$ 11,218