Nature of Business and Basis of Presentation - Additional Information (Details)
$ / shares in Units, $ in Millions |
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6 Months Ended |
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Apr. 02, 2018
USD ($)
$ / shares
shares
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Mar. 16, 2018 |
Jun. 30, 2018
shares
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May 14, 2018
shares
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Dec. 31, 2017
shares
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| Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |
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| Reverse stock split ratio of issued and outstanding shares of common stock |
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one-for-5.263
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| Reverse stock split ratio of issued and outstanding shares of common stock, conversion |
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5.263
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| Reverse stock split effective date |
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Mar. 16, 2018
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| Convertible preferred shares converted to common stock |
24,168,656
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| Preferred stock outstanding |
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0
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0
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| Initial Public Offering |
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| Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |
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| Shares issued and sold |
10,350,000
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| Common stock at a public offering price | $ / shares |
$ 16.00
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| Proceeds from issuance of common stock | $ |
$ 165.6
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| Convertible preferred shares converted to common stock |
24,168,656
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| Preferred stock outstanding |
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0
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