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Balance Sheet Accounts
6 Months Ended
Jun. 30, 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):
June 30, 2021December 31, 2020
Insurance$1,247 $221 
Clinical trial costs996 95 
Professional fees72 49 
Other30 
Prepaid expenses and other current assets$2,318 $395 


Accrued expenses and other current liabilities consist of the following (in thousands):
June 30, 2021December 31, 2020
Clinical trial costs$806 $631 
Compensation and related benefits576 812 
Professional fees149 276 
Other250 194 
Accrued expenses and other current liabilities$1,781 $1,913