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Balance Sheet Accounts
 6 Months Ended
Jun. 30, 2020
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, 2020December 31, 2019
Insurance$1,015  $200  
Clinical development535  224  
Professional services104  49  
Other135  84  
Prepaid expenses and other current assets$1,789  $557  

Accrued expenses and other current liabilities consist of the following (in thousands):
June 30, 2020December 31, 2019
Clinical trial costs$1,043  $371  
Compensation and related benefits487  606  
Professional fees279  194  
Accrued expenses and other current liabilities$1,809  $1,171