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Prepaid expenses (Tables)
12 Months Ended
Dec. 31, 2022
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Summary of Prepaid Expenses
Prepaid expenses consisted of the following (in thousands):
December 31,
20222021
Clinical trial and other development costs$38 $2,169 
Insurance2,027 1,555 
Other 434 313 
Total prepaid expenses$2,499 $4,037