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Basis of Presentation and Significant Accounting Policies - Summary of Percentage of the Company's Total Net Product Revenue (Detail) - Revenue Benchmark [Member] - Customer Concentration Risk [Member] | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Customer A [Member] |  |
Concentration Risk [Line Items] |  |
Concentration risk, percentage | 74.00% | 69.10%
Customer B [Member] |  |
Concentration Risk [Line Items] |  |
Concentration risk, percentage | 6.40% | 10.50%
Customer C [Member] |  |
Concentration Risk [Line Items] |  |
Concentration risk, percentage | 8.30% | 10.10%
Customer [Member] |  |
Concentration Risk [Line Items] |  |
Concentration risk, percentage | 88.70% | 89.70%

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