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Prepaid Expenses and Other Current Assets
12 Months Ended
Dec. 31, 2022
Prepaid Expenses and Other Current Assets [Abstract]  
Prepaid Expenses and Other Current Assets

5. Prepaid Expenses and Other Current Assets

 

Prepaid expenses and other current assets consist of the following:

 

   December 31, 
   2022   2021 
Prepaid insurance  $288   $279 
Prepaid research and development   569    684 
Prepaid software   122    79 
Accrued interest on marketable debt securities   486    634 
Other prepaid expenses   184    173 
Other current assets   127    34 
Total  $1,776   $1,883