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Prepaid expenses
6 Months Ended
Jun. 30, 2022
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]  
Prepaid Expenses

8. Prepaid expenses

As of June 30, 2022, prepaid expenses were $6,026, consisting of $3,728 of prepaid R&D clinical costs, $1,467 of prepaid insurance and $831 of other prepaid costs. As of December 31, 2021, prepaid expenses were $2,519, consisting of $1,481 of prepaid R&D clinical costs, $369 of prepaid insurance, and $669 of other prepaid costs.