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Net Income (Loss) Per Share - Summary of Common Stock Issuance (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |
Common stock, par value (in dollars per share) | $ 0.01 |  | $ 0.01 |  | $ 0.01
Net proceeds | $ 0 | $ 48,887,000 | $ 0 | $ 48,887,000 |
Stock Issued During Period, Value, New Issues |  | $ 48,887,000 |  |  |
Aggregate Value of ATM Program | $ 100,000,000 |  | $ 100,000,000 |  |

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