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Prepaid Expenses and Other Current Assets
12 Months Ended
Dec. 31, 2021
Prepaid Expenses and Other Current Assets [Abstract]  
Prepaid Expenses and Other Current Assets

6. Prepaid Expenses and Other Current Assets

 

Prepaid expenses and other current assets consist of the following:

 

   December 31, 
   2021   2020 
Prepaid insurance   279    292 
Prepaid research and development   684    209 
Prepaid software   79    10 
Accrued interest on marketable debt securities   634    
-
 
Prepaid rent   
-
    113 
Other prepaid expenses   173    111 
Other current assets   34    52 
Total  $1,883   $787