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Selected Balance Sheet Information - Schedule of Prepaid expenses and other current assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Selected Balance Sheet Information    
Prepaid consulting, subscriptions and other expenses $ 251 $ 235
Prepaid manufacturing expenses 216 375
VAT receivable 103 95
Prepaid insurance 84 374
Prepaid clinical research organizations   365
Total prepaid expenses and other current assets $ 654 $ 1,444