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Summary of Significant Accounting Policies - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share for Out of Money Potential Common Shares (Parenthetical) (Detail) - $ / shares | 3 Months Ended | 6 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Stock Options With an Exercise Price of $12.48 per Share [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Stock options exercise price per share | $ 12.48 | $ 12.48 | $ 12.48 | $ 12.48
Stock Options With an Exercise Price of $12.84 per Share [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Stock options exercise price per share | 12.84 | 12.84 | 12.84 | 12.84
Stock Options With an Exercise Price of $26.40 per Share [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Stock options exercise price per share | 26.40 | 26.40 | 26.40 | 26.40
Stock Options With an Exercise Price of $7.16 per Share [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Stock options exercise price per share | $ 7.16 | $ 7.16 | $ 7.16 | $ 7.16

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