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Balance Sheet Details - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Balance Sheet Related Disclosures [Abstract]    
Prepaid research and development $ 4,473 $ 913
Prepaid expenses 610 300
Other current assets 570 288
Interest receivable 194 191
Total prepaid expenses and other current assets $ 5,847 $ 1,692