Equity - Common Stock (Details) $ in Thousands			12 Months Ended
		Apr. 14, 2020	Dec. 31, 2020 USD ($) shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 USD ($) shares
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, shares issued, beginning of period (in shares)			9,772,793	4,568,000	4,543,000
Restricted stock issuances (net of forfeitures and cancellations) (in shares)			8,000	21,000	25,000
Common stock, shares issued, end of period (in shares)			9,780,547	9,772,793	4,568,000
Stock split, conversion ratio		0.005
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares issued for WildHorse Merger (in shares) | $	[1]		$ 0	$ 0	$ 0
Common Stock | Senior notes exchanged for shares of common stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued, conversion (in shares)			0	1,178,000	0
Common Stock | Convertible notes exchanged for shares of common stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued, conversion (in shares)			0	367,000	0
Common Stock | Preferred stock exchanged for shares of common stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued, conversion (in shares)			0	51,839	0
Wildhorse resource development corporation
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares issued for WildHorse Merger (in shares) | $			$ 0	$ 3,587	$ 0

[1] Amounts and shares have been retroactively adjusted to reflect a 1-for-200 (1:200) reverse stock split effective April 14, 2020. See Note 11 for additional information.