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Supplemental financial information - Accrued expenses and other current liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Supplemental financial information    
Employee-related expenses $ 867 $ 2,567
Development costs and sponsored research 455 1,347
Clinical trials 131 810
Other 767 340
Total accrued expenses and other current liabilities $ 2,220 $ 5,064