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Product Revenues, Accounts Receivable, and Reserves for Product Sales - Summary of Product Revenue Allowance and Reserve Categories (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Chargebacks, Discounts, and Fees [Member] |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |
Beginning Balance | $ 164 | $ 67
Provision related to sales in the current year | 17,690 | 614
Adjustments related to prior period sales | (112) | (156)
Credits and payments made | (12,068) | (362)
Ending balance | 5,674 | 164
Government and Other Rebates [Member] |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |
Beginning Balance | 1,936 | 716
Provision related to sales in the current year | 26,661 | 4,569
Adjustments related to prior period sales | (1,223) | (246)
Credits and payments made | (18,476) | (3,103)
Ending balance | 8,898 | 1,936
Returns [Member] |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |
Beginning Balance | 251 | 167
Provision related to sales in the current year | 4,698 | 1,185
Adjustments related to prior period sales | (2,481) | (385)
Credits and payments made | (415) | (716)
Ending balance | 2,053 | 251
Product Revenue Allowance and Reserves [Member] |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |
Beginning Balance | 2,351 | 951
Provision related to sales in the current year | 49,050 | 6,368
Adjustments related to prior period sales | (3,817) | (787)
Credits and payments made | (30,960) | (4,181)
Ending balance | $ 16,625 | $ 2,351

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