v3.26.3
Product Revenue, Net
 9 Months Ended
Sep. 30, 2026
Revenue from Contract with Customer [Abstract]  
Product Revenue, Net Product Revenue, Net
The following table summarizes balances and activity for gross to net reserves (in thousands):
Chargebacks, Discounts for Prompt Pay and Other Allowances
Rebates, Co-Pay Assistance, Returns, and Other
Totals
Balance at December 31, 2025$8,838 $90,504 $99,342 
Provision related to sales in the current year128,225 421,206 549,431 
Adjustments related to prior year sales(2,449)(2,887)(5,336)
Payments and customer credits issued(106,375)(328,731)(435,106)
Balance at September 30, 2026$28,239 $180,092 $208,331 
Concentrations of Credit Risk and Significant Customers
The Company generates revenue from a small number of large, reputable customers. The following customers accounted for over 10% of total gross product revenue during the three and nine months ended September 30, 2026 and 2025.
Three Months Ended
September 30,		Nine Months Ended
September 30,
2026202520262025
Customer A
30 %33 %30 %34 %
Customer B
18 %12 %16 %12 %
Customer C
17 %23 %18 %23 %
Customer D
14 %4 %13 %3 %
Customer E
12 %15 %13 %15 %