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Balance Sheet Components - Schedule of Accrued Other Current Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Balance Sheet Related Disclosures [Abstract]    
Accrued compensation $ 2,086 $ 3,534
Accrued research and development costs 1,878 1,675
Accrued property and equipment 164 117
Other accrued and current liabilities 1,064 927
Total accrued and other liabilities $ 5,192 $ 6,253