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Stockholders' Equity - Treasury Stock (Details) - $ / shares | 1 Months Ended |  |  |
--- | --- | --- | --- | ---
Aug. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Equity [Abstract] |  |  |  |
Shares repurchased (in shares) | 26,659 |  |  |
Purchase price (in dollars per share) | $ 6.91 |  |  |
Treasury stock (in shares) |  | 615,980 | 615,980 | 589,320

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