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, 2020
Dec. 31, 2019
Prepaid Expense And Other Assets Current [Abstract]    
Short-term deposits $ 1,334 $ 1,139
Prepaid research and development expenses 734 1,679
Deferred financing expenses   2,339
Research and development tax credit receivable 720 1,036
Prepaid insurance 397 569
Value added tax receivable 37 68
Other prepaid assets 207 57
Total $ 3,429 $ 6,887