v3.26.1
Product Revenue, Net
 3 Months Ended
Mar. 31, 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 year37,824 128,950 166,774 
Adjustments related to prior year sales(1,978)(2,367)(4,345)
Payments and customer credits issued(23,850)(94,359)(118,209)
Balance at March 31, 2026$20,834 $122,728 $143,562 
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 months ended March 31, 2026 and 2025.
Three Months Ended
March 31,
20262025
Customer A
31 %34 %
Customer B
19 %23 %
Customer C
13 %10 %
Customer D
13 %3 %
Customer E
12 %15 %