6. Accounts Receivable, net

Accounts receivable are mainly attributable to the sale of Ameluz^® in the United States and are expected to be collected within twelve months of the balance sheet date. Trade accounts receivable are stated at their net realizable value. The allowance for credit losses reflects our best estimate of expected credit losses of the receivables determined on the basis of historical experience and current information. In developing the estimate for expected credit losses, trade accounts receivable are segmented into pools of assets depending primarily on delinquency status, and reserve percentages are established for each pool of trade accounts receivable.

In determining the reserve percentages for each pool of trade accounts receivable, we considered our historical experience with certain customers, regulatory and legal environments and other relevant current and future forecasted macroeconomic factors. If we become aware of any customer-specific factors that impact credit risk, specific allowances for these known troubled accounts are recorded.

The allowance for credit losses was $0.2 million and $0.1 million as of June 30, 2026 and December 31, 2025, respectively.