Accrued Liabilities - Schedule of Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Bonus payable	$ 2,851	$ 2,250
Payroll payable	19	18
Accrued interest - other	908	1,015
Accrued rent	414	156
Accrued well costs	4,849	8,386
Third party payments for joint interest expenditures	3,076
Accrued severance, property and franchise taxes	688	115
Accrued federal income tax	441	1,147
Other	438	728
Total accrued liabilities	20,715	16,583
8.750% Senior Notes Due April 15, 2019
Debt Instrument [Line Items]
Accrued interest - Senior Notes		$ 2,768
11.25% Senior Notes
Debt Instrument [Line Items]
Accrued interest - Senior Notes	$ 7,031