Accrued Liabilities and Other (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Payables and Accruals [Abstract]
Accrued payroll	$ 4,035	$ 3,764
Royalties payable	9,592	11,511
Accrued lease operating expense	6,676	3,992
Preferred Stock dividends payable	3,951	3,362
Accrued interest expense	174	925
Accrued ad valorem taxes	0	1,066
Other	2,085	2,715
Total accrued liabilities and other	$ 26,513	$ 27,335