Annual report pursuant to Section 13 and 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
Dec. 31, 2020
Dec. 31, 2019
Prepaid Expense And Other Assets Current [Abstract]    
Refundable FDA filing fee $ 2,876  
Short-term deposits 2,360 $ 1,139
Research and development tax credit receivable 801 1,036
Prepaid research and development expenses 157 1,679
Prepaid insurance 415 569
Value added tax receivable 64 68
Other prepaid assets 231 57
Deferred financing expenses   2,339
Total $ 6,904 $ 6,887