Quarterly report pursuant to Section 13 or 15(d)

Prepaid Expenses and Other Current Assets - Summary of Prepaid Expenses and Other Current Assets (Details)

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Prepaid Expenses and Other Current Assets - Summary of Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Prepaid Expense And Other Assets Current [Abstract]    
Refundable FDA filing fee   $ 2,876
Short-term deposits $ 2,293 2,360
Prepaid insurance 954 415
Research and development tax credit receivable 877 801
Interest receivable 136  
Other prepaid assets 132 231
Prepaid research and development expenses 51 157
Value added tax receivable 14 64
Deferred financing expenses 45  
Total $ 4,502 $ 6,904