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Net Income (Loss) Per Share - Summary of Common Stock Issuance (Details) - USD ($) | 3 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2021 | Sep. 30, 2021 | Dec. 31, 2020
Subsidiary, Sale of Stock [Line Items] |  |  |
Common stock, par value (in dollars per share) |  | $ 0.01 | $ 0.01
Common stock issued for investment | $ 118,777,000 |  |
Aggregate Value of ATM Program |  | $ 100,000,000 |

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