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Balance Sheet Accounts
12 Months Ended
Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Balance Sheet Accounts Balance Sheet Accounts
Prepaid expenses and other current assets consist of the following (in thousands):
December 31,
20212020
Clinical trial costs$1,309 $95 
Insurance217 221 
Professional fees36 49 
Other27 30 
Prepaid expenses and other current assets$1,589 $395 

Accrued expenses and other current liabilities consist of the following (in thousands):
December 31,
20212020
Clinical trial costs$1,325 $631 
Compensation and related benefits989 812 
Professional fees165 276 
Other161 194 
Accrued expenses and other current liabilities$2,640 $1,913