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Stockholders' Equity - Schedule of Common Stock Reserved for Future Issuance (Parenthetical) (Details) - Common Stock - shares | 3 Months Ended | 5 Months Ended | 6 Months Ended | 11 Months Ended
--- | --- | --- | --- | ---
Jun. 30, 2018 | Dec. 31, 2017 | Jun. 30, 2018 | Jun. 30, 2018
Class Of Stock [Line Items] |  |  |  |
Stock repurchase, shares |  | 135,000 |  |
Share Repurchase Program August 2017 |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Stock repurchase, shares | 64,360 |  | 150,528 | 285,528

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