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Prepaid Expenses and Other Current Assets
 6 Months Ended
Jun. 30, 2022
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Prepaid Expenses and Other Current Assets Prepaid Expenses and Other Current Assets
Prepaid expenses and other current assets consisted of the following (in thousands):
As of June 30,
2022
As of December 31,
2021
Prepaid research and development2,448 2,819 
Prepaid insurance849 2,585 
Prepaid licenses1,028 819 
Interest receivable320 385 
Other212 156 
Total prepaid expenses and other current assets4,857 6,764