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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.

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