Fair Value Measurements - Summary of Contingent Interest Payments (Detail) - CRG [Member] - Term Loan Agreement [Member] - Measurement Input, Discount Rate [Member]	9 Months Ended
Sep. 30, 2020
Contingent Interest Beginning in 2021 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
4% contingent interest beginning, Range	10.00%
Contingent Interest Beginning in 2022 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
4% contingent interest beginning, Range	90.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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