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Balance Sheet Details - Schedule of Accrued Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Accrued Liabilities Current [Abstract]    
Accrued compensation $ 1,671 $ 976
Accrued research and development 676 2,369
Other accrued liabilities 604 204
Total accrued liabilities $ 2,951 $ 3,549