Property and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Oil and gas properties:
Proved oil and gas properties	$ 351,488	$ 347,059
Unproved properties	4,872	5,416
Accumulated depreciation, depletion, amortization and impairment	(109,344)	(98,604)
Oil and gas properties, net	247,016	253,871
Pipeline facilities and equipment	12,814	12,714
Base gas	1,937	2,122
Furniture and fixtures, computer hardware and software, and other equipment	6,762	6,649
Accumulated depreciation and amortization	(5,529)	(3,922)
Other property and equipment, net	15,984	17,563
Total property and equipment, net	$ 263,000	$ 271,434