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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
 3 Months Ended
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2023
Mar. 31, 2023
Chargebacks, Discounts, and Fees [Member]        
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]        
Beginning Balance $ 5,671 $ 5,674 $ 1,446 $ 164
Provision related to sales in the current year 10,025 9,575 3,944 1,466
Adjustments related to prior period sales (131) 146 (84)  
Credits and payments made (9,635) (9,724) (1,668) (184)
Ending balance 5,930 5,671 3,638 1,446
Government and Other Rebates [Member]        
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]        
Beginning Balance 12,098 8,898 2,861 1,936
Provision related to sales in the current year 17,777 13,125 5,114 2,566
Adjustments related to prior period sales 354 (19) 30 (2)
Credits and payments made (14,640) (9,906) (2,946) (1,639)
Ending balance 15,589 12,098 5,059 2,861
Returns [Member]        
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]        
Beginning Balance 1,453 2,053 653 251
Provision related to sales in the current year 1,039 1,355 1,588 651
Adjustments related to prior period sales (983) (96) (416) (249)
Credits and payments made (326) (1,859) (141)  
Ending balance 1,183 1,453 1,684 653
Product Revenue Allowance and Reserves [Member]        
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]        
Beginning Balance 19,222 16,625 4,960 2,351
Provision related to sales in the current year 28,841 24,055 10,646 4,683
Adjustments related to prior period sales (760) 31 (470) (251)
Credits and payments made (24,601) (21,489) (4,755) (1,823)
Ending balance $ 22,702 $ 19,222 $ 10,381 $ 4,960